It's been a while, but Calculating God sticks in my head as an interesting exploration: What if there is scientific evidence out there for a supreme being, but to find it you have to correlate knowledge from multiple inhabited worlds across the galaxy?

The specific situation is a pattern of mass extinctions that's common on all known inhabited worlds, and a multispecies expedition has come to Earth to cross-check our fossil record and see if it matches too. (It does, of course, which is what sets the rest of the book in motion.)

Like a lot of Sawyer's more philosophical science-fiction, it's mostly talking and thinking and figuring things out. There's not a whole lot of action, and I remember thinking the young-earth-creationist vandals were too much of a caricature to take seriously. (I suspect if I read it again now, they'd seem subtle compared to the pundits and politicians making noise today.)

There's a deus ex machina close to the end, but it's sort of the point of the book, and an epilogue that pulls together several of the "why is this aspect of life universal???" questions the characters had been trying to figure out.

Cross-posted from my website.