Book · 2021
Project Hail Mary
by Andy Weir
A high-school teacher wakes up alone on a spaceship with no memory of how he got there and one job left: save Earth.
What does Reddit think of Project Hail Mary?
3421 mentions, the highest total in this set, with r/printSF (1852) edging out r/suggestmeabook (1457) and r/Fantasy trailing far behind at 108. The signature comment (↑301) isn't analysis, it's a status update: "finished in 3 days and I've been in a reading coma ever since." Go-in-blind is the house style here too; one reader (↑203) says they avoided details for years despite constant recommendations, then read it in one sitting once they finally gave in. It's also become recommendation shorthand: one comment (↑209) tells an OP asking for three different things at once that this book "basically combines all 3." printSF's big comparison lists (↑218) put it alongside Dark Matter, Red Rising, and Exhalation rather than treating it as a singular pick, which flattens it into one strong option among many rather than a standout. Mentions have grown every year since the 511 recorded in 2021, the publication year, topping out at 783 in 2025, still climbing five years out.
Community feedback & reader fit
Themes
- · amnesiac scientist solving a first-contact puzzle
- · reading in one sitting
- · recommendation shorthand for combined asks
- · go-in-blind consensus
Common praise
- + One reader sums up the experience as finishing in three days and being 'in a reading coma ever since' (↑301).
- + It gets recommended to answer three different asks at once, a commenter saying it 'basically combines all 3' (↑209).
- + A reader who avoided spoilers for years says the payoff justified the wait once they finally started it (↑203).
Common criticism
- − printSF's comparison lists slot it alongside Dark Matter, Red Rising, and Exhalation rather than singling it out, treating it as one strong option among many rather than a standout (↑218).
- − r/Fantasy barely engages, 108 mentions against a combined 3309 from the other two subs, so it reads as a genre-crossover book that hasn't actually crossed into fantasy discussion.
Who it's for
Read this if three different friends have already spoiled parts of it and you're tired of dodging them; per the sample, waiting doesn't ruin the experience (↑203). You'll fit right into the printSF crowd that ranks it next to Dark Matter and Red Rising rather than treating it as untouchable. First-contact and hard-science puzzle-solving are the draw here, not prose style, going by what actually gets quoted. If you've already read Weir's other books, expect recommendation threads to assume you have and route you here anyway.
Mentions over time
Top subreddits
Which Reddit comments matter for Project Hail Mary?
Top-upvoted quotes across the subreddits where this book is mentioned. Click through to read the full thread.
“Project Hail Mary by Andy Weir Finished in 3 days and I’ve been in a reading coma ever since. So good!!
“Let me save you a click... Dark Matter, by Blake Crouch All Systems Red, by Martha Wells Recursion, by Blake Crouch The Long Way to a Small, Angry Planet, by Becky Chamber Wool, by Hugh Howey Red Rising, by Pierce Brown Exhalation, by Ted Chiang We Are Legion, by Denn…
“Not OP but Project Hail Mary if you haven’t yet! It basically combines all 3 lol.
“Project Hail Mary. I went in with no knowledge of the story. I’d seen it recommended on here so many, many times that I’d slotted it in to my “to read” pile. It never made the top because I knew nothing about it. Then one day, after reading on here another Redditor enthusing about it and it coincidi…
“{{Project Hail Mary}} by Andy Weir
“Another widely loved book of Andy Weir: Project Hail Mary
“75 - The Echo Wife, by Sarah Gailey 74 - The Calculating Stars, by Mary Robinette Kowal 73 - Redshirts, by John Scalzi 72 - Beautyland, by Marie-Helene Bertino 71 - The Ten Percent Thief, by Lavanya Lakshminarayan 70 - Midnight Robber, by Nalo Hopkinson 69 - Snow Crash, by Neal Stephenson 68 …
“Project Hail Mary by Andy Weir
Convinced? Pick up Project Hail Mary
Readers also mention
All books like Project Hail Mary →Books that share discussion threads with Project Hail Mary — counted from the comments, not curated.
The Martian
Andy Weir
A botanist gets left for dead on Mars and has to grow food on a planet that wants him gone, one duct-taped fix at a time.
Children of Time
Adrian Tchaikovsky
A terraforming experiment goes wrong, a nanovirus lands on spiders instead of monkeys, and evolution builds a civilization nobody planned for.
All Systems Red (The Murderbot Diaries)
Martha Wells
A security robot hacks its own governor module, gains free will, and spends its days streaming soap operas instead of killing anyone.
Blindsight
Peter Watts
A crew of post-human specialists meets first contact and reports back that consciousness might be what's holding humanity back.
The Three-Body Problem
Liu Cixin
A Chinese radio astronomer's decades-old reply to an alien signal puts Earth on a collision course with an invasion fleet centuries out.
Hyperion
Dan Simmons
Seven pilgrims journey toward a monster that grants one wish and kills everyone else, and each tells the story of why they came.
Project Hail Mary — frequently asked
Is Project Hail Mary worth reading if parts of it have already been spoiled?+
The data suggests yes. One reader (↑203) describes avoiding details for years despite constant recommendations, then reading it in a single sitting once they finally gave in, with no complaint that the wait or partial spoilers dulled it.
What does Reddit think of Project Hail Mary?+
Overwhelmingly enthusiastic. It leads this dataset with 3421 mentions, driven by r/printSF (1852) and r/suggestmeabook (1457), with reactions that read more like status updates than reviews, 'finished in 3 days and been in a reading coma ever since' (↑301) being the top-voted example.
How does Project Hail Mary compare to other printSF favorites like Dark Matter and Red Rising?+
It shows up alongside them constantly rather than above them. One widely upvoted comparison list (↑218) groups Project Hail Mary with Dark Matter, Red Rising, and Exhalation as a single recommended cluster rather than ranking it as the standout of the group.
Should I go in blind for Project Hail Mary?+
Reddit's consensus here is yes. Multiple threads recommend avoiding plot details in advance, and the highest-upvoted account of the reading experience (↑203) comes from someone who deliberately avoided spoilers for years before finally reading it.