I’m very picky with my ratings, so I’m happy to say that Project Hail Mary was amazing and my first 5 star review of 2021. When it starts, the narrator wakes up alone with no idea who he is, where he is, or why. As he explores and his memories start to come back, with the book unfolding both in the present and his flashback returning memories, both he and the reader discover that he is alone on a spaceship on a very important mission. There is SO much more to it than that, but because of the nature of the book, pretty much everything about it is a spoiler and it’s so much better to see it unfold yourself. Just know that it is absolutely terrific.
For the vibe, think of the best of intellectual science fiction - books like The Sparrow and Children of Time, movies like Interstellar and Arrival, and of course both the book and movie of The Martian, Andy Weir’s first book. Iit is both a little more science-y (which even though I couldn’t understand it, was interesting), and more science fiction-y than The Martian, but it’s funny and emotional as well. It was a long book but I read it quickly because I couldn’t put it down. I was thrilled to get an advanced copy from Netgalley (it’s out 5/4), and I highly recommend reading it as soon as possible both because it is great, and to avoid spoilers.