A whoooooole bunch of people have reviewed this book in depth, and I don’t think I have much to say that hasn’t been covered already, so I’ll be brief.
Illuminae is sort of like Firefly/Serenity had a baby with the slow space chase from Star Wars: The Last Jedi and left it to be raised by The Martian. It’s kind of brilliant. I mostly loved it. I had to take points off for some stylistic choices I found questionable. The incident reports read like entries in a military sci-fi short story contest, and the AI’s inner monologue reads like a naval-gazing white dude bucking for a Pulitzer in literature. I found it a tad annoying after a while. But these were minor glitches in an otherwise engrossing page-turner. I am so glad I already own the rest of the series.
On to book two!