This took me two attempts. First time through I gave up around page eighty because the book hops between three separate characters in short bursts and I kept losing my footing just as I started to attach to one of them. Went back to it a few months later determined to push through and I’m glad I did, because once Sylveste, Khouri, and the Nostalgia for Infinity’s crew start converging, the whole machine locks into gear and does not let go.

Reynolds was an actual astrophysicist before he wrote full time and it shows, sometimes to a fault, there’s a stretch in the middle where a character explains centrifugal force in enough technical detail that I found myself smiling at how little he trusted the reader to just accept artificial gravity. But the scale of the thing, a dead civilization wiped out in an afternoon by something called the Event, a captain being slowly consumed and rebuilt by an alien plague that keeps him barely alive, an elevator ride up the hull of a ship so large it stops being a vehicle and starts being a landscape, that stuff is the reason to read hard SF at all. The last four chapters especially pile revelation on revelation faster than the rest of the book combined, and I had to sit with it a minute once I closed the cover.

Where I’d push back a little is characters, they stay somewhat murky and hard to fully invest in even by the end, more chess pieces serving the plot’s paranoid, everyone-has-an-agenda worldview than people I worried about. A few readers I’ve compared notes with say this cools off considerably once you’ve also read House of Suns, that the later book does the same trick with more confidence. I believe it, but this is still a strong, moody debut on its own. Four stars, patience required, payoff earned.