HomeBooksProject Hail Mary

Project Hail Mary
reviewed.

A man wakes up alone on a spaceship with no memory of who he is or why he's there — and the survival of Earth depends on him figuring it out.

★ 4.5
Our rating
2021
Published
Science Fiction
Genre
2021 Project Hail Mary PH Andy Weir
HardcoverPaperbackKindleAudiobook
The verdictAndy Weir's best book. The Martian's problem-solving joy, a genuinely moving friendship at its core, and a final page that readers bring up years later. If you read one feel-good science fiction novel, make it this one.

What it's about NO SPOILERS

Ryland Grace wakes from a coma aboard a small spacecraft with two dead crewmates, no memory, and a slowly returning suspicion that he is very, very far from home. As fragments come back, he pieces together the mission: the sun is dimming, Earth is heading for a new ice age, and his ship — the Hail Mary — is humanity's last-ditch attempt to find out why and stop it.

The 'why' turns out to be a microscopic organism dubbed Astrophage, and the answer to it may lie in the Tau Ceti system, where Grace isn't the only one who's come looking. What he finds there turns a lonely survival story into something warmer and stranger — one of the most beloved first-contact stories in modern science fiction.

Weir alternates between the ship and flashbacks to the desperate international project that launched it, and both threads run on the same fuel that powered The Martian: a likable narrator solving one life-or-death science problem after another, with jokes. It's an unabashed crowd-pleaser, and it works.

Is Project Hail Mary worth reading?

Yes — it's Weir's most complete novel and one of the most purely enjoyable science fiction books of the 2020s, even for people who don't usually read the genre.

Know what you're getting: Weir writes engineering puzzles, not literary prose. Ryland Grace sounds a lot like Mark Watney from The Martian — quippy, upbeat, allergic to despair — and if that voice grated on you before, it will again. The flashback structure is a bit mechanical (memories return exactly when the plot needs them), some of the science explanations run long, and the characters back on Earth are thin, particularly the cheerfully authoritarian project director Stratt. None of that stops the central relationship of the book from being one of the most charming things in modern SF, and the ending is close to perfect.

Who it's for

Pick it up if

  • Fans of The Martian who want the same voice with a bigger, better story
  • Readers who love competence-porn problem-solving — science as the action scenes
  • People who want optimistic, feel-good science fiction rather than dystopia
  • Audiobook listeners — Ray Porter's narration is widely considered one of the best in the genre

Skip it if

  • Mark Watney's jokey narration in The Martian annoyed you — Grace is cut from the same cloth
  • You want deep character studies and literary prose over plot and puzzles
  • Page-long explanations of physics, biology, and orbital mechanics feel like lectures to you
  • You prefer morally murky, pessimistic SF — this book is sincere to its bones

Is there a movie or show? READ IT BEFORE YOU WATCH IT

A film adaptation is on the way. Ryan Gosling stars as Ryland Grace, with Phil Lord and Christopher Miller (The Lego Movie, Spider-Verse) directing from a script by Drew Goddard, who also adapted The Martian. Amazon MGM is behind it, and it's slated for a 2026 theatrical release — dates can move, so check before you plan around it. This is the rare book where reading before watching really matters: the story is built on reveals the trailer and film can't help but expose, so read it first if you can.

If you liked this READ NEXT

2011 The Martian M Andy Weir
Science Fiction

The Martian

by Andy Weir

Weir's breakout — one stranded botanist, one hostile planet, the same science-the-heck-out-of-it spirit.

2016 Dark Matter DM Blake Crouch
Science Fiction

Dark Matter

by Blake Crouch

Another propulsive, high-concept page-turner for readers who want thrills with their physics.

2015 Children of Time CT Adrian Tchaikovsky
Science Fiction

Children of Time

by Adrian Tchaikovsky

If the first-contact half was your favorite part, this is the deeper, stranger version of that idea.

Frequently asked questions

Do I need to read The Martian before Project Hail Mary?

No — they're completely unrelated stories with no shared characters or setting. They just share Andy Weir's trademark style: a wisecracking narrator solving survival problems with real science. You can read them in either order; many readers actually consider Project Hail Mary the better book.

Should I read Project Hail Mary before the movie comes out?

Yes, if you can. The book is structured around memory-loss reveals and one very large mid-story surprise, and marketing for the Ryan Gosling film (currently slated for 2026) inevitably gives some of it away. Going in blind is a big part of what makes the novel special — even avoiding the trailer is a defensible choice.

Is Project Hail Mary a standalone or part of a series?

It's a true standalone. The story wraps up completely — no cliffhanger, no sequel hook — and Weir has said he has no current plans for a follow-up. If you want more of his work afterward, The Martian and Artemis are his other novels.

Is the audiobook of Project Hail Mary really that good?

It has a genuine cult following. Ray Porter's narration won an Audie Award, and the audio format handles one particular aspect of the story — no spoilers — in a way print simply can't. If you're an audiobook person at all, this is one of the strongest cases for choosing audio over print.

A small, excellent email

One good book.
Every single week.

One good book in your inbox every week — picked like this one.