This Nebula Award nominee is another disappointment for me. I have always enjoyed stories about layers of simulation, where our universe runs inside another simulated universe, which itself may be running inside yet another. That idea goes back at least to fiction and non-fiction by StanisÅ‚aw Lem, especially Non Serviam (1961), and for me the best treatment remains David Brin's Stones of Significance (2000). Daryl Gregory’s version feels as though he never read those stories or explored the idea very far. The science and software are so terrible that reading parts of the book hurt. The arbitrary supernatural events feel like obvious plot devices or symbols rather than consequences of the simulation premise.
That failure frustrated me because I have a soft spot for stories built on the pilgrimage structure of The Canterbury Tales. I loved Hyperion for exactly that reason. Gregory uses the same device well here. A bus full of colorful characters who don't know each other is stuck together and forced to interact. That setup creates friction, revelation, and momentum. Gregory writes rich characters with big-hearted character arcs. The twisting story holds the reader's interest. And the mysterious teleporting traveler adds genuine intrigue.
The whole book would have worked far better as high fantasy with an arbitrary magic system. At least then I would have known to avoid expecting coherent science fiction.
Entertaining in places, often warm and engaging, but conceptually hollow. 2/5 stars.
