Book Review: Project Hail Mary by Andy Weir

“What’s the cube root of eight?” the computer asks.

“Where am I?” I say again. This time, it’s easier.

“Incorrect. What’s the cube root of eight?”

I take a deep breath and speak slowly. “Two times e to the two-i-pi.”

“Incorrect. What’s the cube root of eight?”

But I wasn’t incorrect. I just wanted to see how smart the computer was. Answer: not very.

Project Hail Mary, p.5 –

And with that opening, my friends, there was no doubt in my mind that I was going to love this book πŸ₯° I mean, I’ve been spending most of the past week trying to get my computer to calculate things that it doesn’t want to calculate, so I immediately related to this protagonist with a mathematical sense of humor who obviously doesn’t trust his computer’s intelligence. And rightfully so, because even WolframAlpha can tell you that the cube root of eight is the same thing as two times e to the two-i-pi:

Your futuristic software has really got to suck if the free online version of a twenty-first century math program knows more about polar coordinates than your computer does…

But anyway, back to the book: From the very beginning, I was absolutely hooked, and then it just kept getting better! Project Hail Mary has everything I ever could have hoped for in an epic science fiction adventure – lots of math, wacky humor, one of the most adorable friendships I’ve ever read about, an alien threat that could mean the end of life on Earth as we know it – and things I didn’t even dream of asking for, like a bunch of language snippets and music trivia that made my inner nerd dance with joy! It constantly had me at the edge of my seat bed because I just couldn’t put it down until I knew how it ended. Honestly, guys, I think I might like this one even more than The Martian

Sure, maybe Project Hail Mary has its flaws. Maybe Andy Weir’s protagonists do always have the same personality. Maybe it’s a teensy bit unrealistic that a middle-school science teacher would be one of the few people chosen for a critical mission that could save the world and also happen to have a nearly encyclopedic memory for scientific facts. Or that a complete non-musician would, within a couple of weeks, be able to learn a language that involves distinguishing chords with perfect pitch abilities that I still haven’t developed after almost two decades of playing the violin and piano. But I don’t care. I LOVE THIS BOOK!! I think it may have snuck its way into my number two spot of the year. (I’m sorry, Project Hail Mary, but The Betrayals is still better.) So obviously, it’s getting all the stars! It just checked all the boxes for me!


Title: Project Hail Mary

Author: Andy Weir

Genre: Science Fiction

Page Count: 476

Publication Date: May 4th, 2021

[Is this date a coincidence? πŸ€” Thankfully, though, this book has more Star Trek than Star Wars references, which I take to mean that Andy Weir also acknowledges Star Trek‘s vast superiority πŸ˜‡]

Date Read: July 19, 2021

[Yes, I read this pretty much in one sitting πŸ˜… I told you I couldn’t put the book down, didn’t I?]

Rating: 5/5 Stars

Synopsis (Goodreads):

Ryland Grace is the sole survivor on a desperate, last-chance mission – and if he fails, humanity and Earth itself will perish.

Except that right now, he doesn’t know that. He can’t even remember his own name, let alone the nature of his assignment or how to complete it.

All he knows is that he’s been asleep for a very, very long time. And he’s just been awakened to find himself millions of miles from home, with nothing but two corpses for company.

His crewmates dead, his memories fuzzily returning, Ryland realizes that an impossible task now confronts him. Alone on this tiny ship that’s been cobbled together by every government and space agency on the planet and hurled into the depths of space, it’s up to him to conquer an extinction-level threat to our species.

And thanks to an unexpected ally, he just might have a chance.

Part scientific mystery, part dazzling interstellar journey, Project Hail Mary is a tale of discovery, speculation, and survival to rival The Martian – while taking us to places it never dreamed of going.

If any of this sounded at all interesting to you, I highly recommend you go grab yourself a copy and start reading!

And as for those of you who have already read Project Hail Mary – let’s talk spoilers!! πŸ€—


First, Rocky!!!! I love Rocky!!! 😍😍😍 My compelling need to talk about him is actually a big reason why I’m writing this review in the first place because, unfortunately, I just don’t see how I can mention him in my wrap-up without spoiling that Project Hail Mary is, first and foremost, a first contact story.

You guys, you have no idea how much I lapped this stuff up! I absolutely loved everything, from learning about Rocky’s physiology – Finally, an alien that isn’t just a human with pointy ears and a weird skin color! – to figuring out how his language worked and how Eridian societies functioned. Seeing Ryland and Rocky get so excited about everything that had to do with the other’s culture and civilization despite their home planets being in mortal danger was the most adorable and relatable thing ever, and of course, I immediately fell for it. Just get two nerds in one room and they’ll be friends for life, no matter where they’re from!

And aahhh, the communication part! I absolutely love how excited both Rocky and Ryland got when they understood something about the other. Like, Rocky being over the moon when he found out Ryland could see light? Or him immediately welcoming Ryland as a friend and asking Ryland to watch him sleep, like his fellow Eridians would do? [Side note to Edward Cullen: Maybe you should check out this planet, it sounds like you might like it…] Or Rocky immediately offering his extra fuel to Ryland and being beyond excited about computers and relativity? It was too cute!! Seeing Rocky and Ryland together honestly gave me hope for humanity’s future. Although Rocky being the sole survivor of his crew was also beyond sad 😭

Also, can I just mention that I love that Andy Weir gave us a plausible explanation as to why humans and Eridians evolved similarly enough to be in the same place at the same time and be able to communicate? Lazily convenient first contact stories are actually one of my biggest science fiction gripes, so I love that Project Hail Mary went into depth and really tried to make Ryland and Rocky’s friendship plausible. All those thoughts on the history of mankind and life in general were fascinating, as was the background we got on the Eridians and their home planet. These aliens were different enough to make them interesting, and backed up so well through scientific arguments that I couldn’t help but feel they were actually real.

In general, I just absolutely love how much science and math were in the book 🀩 I’ve said it before, and I’ll say it again: Andy Weir just knows how to write exactly the sort of science fiction I love to read. Stuff where you can nerd out and convert base six numbers into base ten numbers just for the fun of it or reflect on the number of protons in an iron atom.

I return to the tunnel to tell Rocky all about how smart I am.

He balls a fist at me as I enter. “You left! Bad!

“I measured the mass! I made a very smart experiment!”

He holds up a string with beads on it. “Twenty-six.”

The beaded string is just like the ones he sent me back when we talked about our atmospheres –

“Oh,” I say. It’s an atom. That’s how he talks about atoms. I count the beads. There are twenty-six in all.


It takes a second to sink in. Then I slap my forehead.

You are bad.

It was a fun experiment, but a total waste of time. Rocky was giving me all the information I needed. Or trying to, at least. I know how dense iron is, and I know how to calculate the volume of a sphere. Getting to mass from there is just a little arithmetic.

Project Hail Mary, p. 209-210

And yet, all the science is always relevant to the plot somehow. It is never about info-dumping, but all about making this world Andy Weir created seem real. Even things that we have never seen before, such as Astrophage, have plausible explanations that the characters slowly have to discover through scientific method. And as a STEM-student, I just find that so satisfying!

However, science is never simple. There are always variables you didn’t think about and problems you run into along the way that you never even considered. There’s a reason why writing my thesis is so frustrating: When something finally works, it usually brings with it a whole lot of new problems that will require even more thinking. And Andy Weir perfectly captures that. Oh, you finally bred Taumoeba that are resistant to high levels of nitrogen? Well, too bad they also happened to evolve into something that can permeate your xenonite containers! These kinds of things made Project Hail Mary realistic, and it made things exciting. Like Ryland Grace and Rocky, you could only hope for the best and pray that whichever other variables you hadn’t considered wouldn’t have too drastic of an impact. Although when they did, the suspense was off the charts!

There was no pronunciation or inflection of the sounds. Just notes. Like whale song. Except not quite like whale song, because there were several at once. Whale chords, I guess. And he was responding to me.

Project Hail Mary, p. 178

In addition to the math and science, though, Project Hail Mary also included my other big obsession: LANGUAGES!!! I mean, first, there are a whole bunch of snippets in different human languages, and I was in seventh heaven because out of the three that cropped up most often in the book, I speak two! So the whole time, I was reading all of these Russian and German bits and super excited about all the Easter eggs I was getting. Did I mention I love when books just include stuff in other languages without providing translations? πŸ₯°πŸ₯°πŸ₯° It is the best type of riddle ever! Unfortunately, though, I don’t speak Chinese and don’t know how to type the characters into my phone, either, so I had to rely on Google Translate’s picture recognition function to see what the Chinese bits meant πŸ˜…

Like, apparently, the end of this note on p. 92 says something along the lines of “Please take me to the official meeting room on the deck,” but how do I know for sure? Google Translate isn’t always the most trustworthy… So yeah, if any of you happen to speak Chinese and would like to give me a proper translation, go right ahead! πŸ™ƒ

And then, as if I wasn’t already excited enough about all the real languages in this book, we also got alien first contact!! Oh my gosh, guys! It was so cool! If you know me at all, you’ll know that made-up languages that actually have a real grammatical structure are one of my absolute favorite things to come across in books or movies and TV shows. Both seeing Rocky learn English and Ryland learn Eridian was so cool! Especially the Eridian! I really think I should probably learn a language where pitch plays a major role eventually, seeing how obsessed I was with this one…

(Although I do wish there had been bar lines in the book so that we could also have gotten to see the exact pitch of the notes! And I wanted those chords! Why couldn’t someone have made a special font to accommodate that, huh? 😀)

Oh yeah, and before I forget in all my excitement about math and languages, I suppose the plot was pretty epic, too 😁 I mean, the sun in danger? Two planets in danger of dying out? The stakes are astronomical, the odds incredibly high. And yet, somehow, things work out because countries, different planets even, are able to come together to save one another. Ryland giving up a life on Earth to save the Eridians almost had me tearing up a little. If anything, Andy Weir’s stories are always so hopeful. If we work together, they tell us, we can achieve the impossible. If we encounter one another with trust and not fear, we can have some of the most beautiful friendships imaginable. Because that’s what Project Hail Mary really is. It’s a story about how two wacky scientists from different planets became friends while trying to save their home worlds from destruction. And who wouldn’t want to read about wacky scientist friends?

Anyway, I’ll leave it at that for now… But if any of you want to talk to me about Project Hail Mary in the comments, I won’t promise that there won’t be any more gushing 😁 This book was just so good, you guys! πŸ₯°

(Oh, and also: In case any of you are wondering where I’ve been all week, don’t worry πŸ˜… I currently have loads of exams to grade and loads of thesis to work on, so this semi-presentness will probably last a while… πŸ™ˆ It’s not you, I promise!)

56 thoughts on “Book Review: Project Hail Mary by Andy Weir

    • abookowlscorner says:

      It IS fun! I had such a blast reading it, and the nerdy beginning was already the best thing ever! πŸ€— So yeah, if you think that sounded cool, I highly recommend giving the whole book a try 😁

      Liked by 1 person

    • abookowlscorner says:

      I’m so happy you loved The Martian – it’s one of my favorite books! πŸ₯° But yeah, Project Hail Mary certainly gives The Martian a run for its money, so I fully agree that you should read it 😁 I hope you enjoy it as much as I did!

      Liked by 1 person

  1. Definitely Moi says:

    Haha, the opening lines are the best πŸ˜‚πŸ‘πŸ‘

    I couldn’t read much of the review because of spoilers, but I’m sure that the book is amazing, consisering you gushed about it for almost 15 paragraphs πŸ˜‚. I must give this a read soon!

    Liked by 1 person

  2. Nehal Jain says:

    Once again, I had to skim read the review coz of the spoilers, but that excerpt at the beginning does look like something….I am not sure though that I like books centred around Maths, hehe.

    Liked by 1 person

  3. Rabeeah says:

    Despite the ❌ maths ❌ I really enjoyed your review of this and it looks super interesting! Will definitely have to give it a chance, although I still haven’t read The Martian yet.

    Liked by 1 person

    • abookowlscorner says:

      But… the math was one of the best parts πŸ˜₯ Why is my beloved subject getting so much hate? 😭
      But I’m glad you still think it sounds interesting, and I would love to hear your thoughts on it! And on The Martian as well, to be honest 😊 All of Andy Weir’s books are well worth reading!

      Liked by 1 person

        • abookowlscorner says:

          I definitely think so πŸ˜„ I’d say The Martian is a tad funnier than the others, but I still found myself smirking a lot while reading this one! 😊 Although I did think the math jokes were the most hilarious ones, so I’m not sure how much you should trust my judgment πŸ˜…πŸ˜‚

          Liked by 1 person

    • abookowlscorner says:

      I’m glad the book caught your interest – my new mission in life is to get as many people as possible to read it πŸ˜πŸ˜‚ And I think there’s plenty in here for people to enjoy even if they aren’t as math-obsessed as I am! I’ve been told “normal” people just skim over all those amazing sciency details πŸ˜ͺ
      And lol, WolframAlpha is a life-saver! I still use it for quick calculations because it is just so easygoing as far as input is concerned – you can get away with anything and it miraculously understands you 😁

      Liked by 1 person

  4. Line says:

    I understood very little of your introduction to this post, confirming that math is actually a foreign language and that must be why you love it so much πŸ˜‰
    I had heard about that criticism of Andy Weir about his characters being the exact same, so The Martian is probably a one-and-done thing for me concerning Andy Weir. However, I’m really happy that you liked this one so much! I would have been concerned had it beat The Betrayals but second place is pretty amazing considering all the books you’ve loved this year 😊

    Liked by 1 person

    • abookowlscorner says:

      Apparently I traumatized quite a few people with this introduction, but I obviously wouldn’t change a thing about it πŸ˜‡ I need to use every opportunity I can get to convert people into fellow math lovers! In a way, I guess it is kind of like a language; it has so much logical structure! And as an added bonus, it’s very international πŸ˜‰

      I also see where you’re coming from as far as the character variation is concerned. It didn’t bother me in this one, but I found it very jarring in Artemis πŸ˜… So I can see why you would want to stick to The Martian. Even though it breaks my heart to know you might never meet Rocky (The best character Andy Weir has ever come up with!) or learn about all the stuff that gets lost in intergalactic translation…

      But yes, I’m very thrilled with this reading year! I honestly don’t think I’ve had one this great since starting university πŸ˜…

      Liked by 1 person

      • Line says:

        I actually used to love math because of that logicalness and it was probably the subject I was best at when I was younger. Do I win some points for that? πŸ˜‰ I just didn’t take it at university level so every time you speak math it’s gibberish to me πŸ˜…

        And things getting lost in intergalactic translation does sound like something I should take a closer look at πŸ˜„ I didn’t read your spoiler section, so maybe I’ll find an interest in it one day.

        Liked by 1 person

        • abookowlscorner says:

          You definitely win some points for that πŸ˜‚ And I’m also thrilled to hear you didn’t read the spoiler section because that means there’s still hope! After all, thanks to A Court of Silver Flames, I know that you have no qualms about being spoiled for books you (quite sanely, may I add) have absolutely no interest in, so that must mean you never wrote this one off completely 😁 And it has so many wonderful language moments! 😊

          Liked by 1 person

    • abookowlscorner says:

      I know, right?! These people don’t know what they’re missing out on by writing math off like that! πŸ˜ͺ But if you loved those lines and love math, I really think you’ll love this book, too! πŸ€— I’ll be eagerly anticipating your thoughts if you do decide to pick it up πŸ’™

      Liked by 1 person

    • abookowlscorner says:

      Yay, success! πŸ€— I did like Artemis, but also found it kind of disappointing after The Martian. I just couldn’t get over the fact that the protagonist was basically Mark Watney in a female body, and all her comments about other women’s boobs seriously weirded me out πŸ˜… But Project Hail Mary is way better, in my opinion, and I really think anyone who loved The Martian will probably love this one, too!

      Liked by 1 person

  5. Lesserleaf says:

    It sounds really good. I didn’t read the spoilery part of your post since I do think I may want to pick it up. Thanks for pointing it out to us πŸ™‚
    I’ve not read The Martian, but I liked the movie.

    Liked by 1 person

    • abookowlscorner says:

      Gosh, having to wait for over three months sounds absolutely torturous! I’m not sure I would have had enough self-control to not just buy a copy eventually πŸ˜… But I definitely think your wait will be worth it because this book is absolutely amazing! You’re going to love how much nerdy science stuff is in here 😊

      Liked by 1 person

      • Emily @frappesandfiction says:

        I’m hoping my library acquires more copies/people ahead of me return it early so I can get it by the end of the month which in my experience sometimes happens– I would have just bought it a while ago but I don’t like spending so much money on hardcover books. I read the teaser chapters and I can already tell I’m going to love it based on the fact that I laughed multiple times and there was physics, lots of physics

        Liked by 1 person

        • abookowlscorner says:

          I’ll keep my fingers crossed for you then! I’m also very selective on what I spend money on, but when I saw that our small local bookstore, which only ever has a handful of English books anyway, had a paperback edition, I just couldn’t resist πŸ˜‚ It was still pretty expensive, but since I know I’ll be rereading it time and time again, I’d say it was a very good investment 😁


    • abookowlscorner says:

      Thank you! I’m so glad you loved Project Hail Mary, too; fellow sci-fi fans are always welcome! 😊 The Betrayals is a very different type of book, though – it’s probably not for everybody, since it is rather slow and lets you piece together a lot on your own… But I thought it was brilliant! πŸ₯° I really hope you like it if you do end up reading it!


  6. Tomas S says:

    So I just finished listening to the audiobook and „boy I loved that book“. Loved the whole plot of remembering, thus the flashbacks are not annoying and bringing the whole new information to the story. Awesome book, great narration.

    Liked by 1 person

  7. lifeongrowing says:

    I just finished this book and LOVED it so much!! I came across your review while googling what I could possibly read next that will bring me this much joy 😍 Any suggestions?? Doesn’t have to be sci-fi or similar story, I just loved the characters and the writing style so much.

    Liked by 1 person

    • abookowlscorner says:

      First off – I’m thrilled you also loved Project Hail Mary!!!! Though, obviously, I would have been surprised if you hadn’t, given how absolutely awesome it is πŸ₯°

      As to reading suggestions, that’s much harder πŸ˜… Andy Weir has such a unique style that it’s very difficult to find anything quite like his books… So obviously, if you haven’t already read his other works, I’d highly recommend The Martian, which is very similar in style. However, if you have already read The Martian and would nonetheless like to stay in the fast-paced sci-fi genre, maybe you’d enjoy Amie Kaufman and Jay Kristoff’s Illuminae Files, Brandon Sanderson’s Skyward, or something by Michael Crichton (Micro and Jurassic Park are my favorites). Or, if you’re going for the humorous angle and want to dwelve into a contemporary, you might like Carl Hiaasen’s Chomp, which is similarly wacky. Or, if you want the feel-good character relationships, The Penderwicks series is one of my personal favorites 🀩 Generally, if I like a book a lot, it usually has to do with the characters, so if you’d like, you could also browse my blog and see if any of my own favorites interest you – I just posted a list of my top books of 2021, for example.

      Anyway, sorry I can’t be more helpful – recommending books when you don’t know other people’s reading tastes is always a bit hard… πŸ˜… But hopefully, at least one of these sparked your interest! And if you find a book similar to Project Hail Mary, make sure to let me know!


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