It's a short story (or perhaps a novella) about parallel worlds. (The publisher calls this book "a cyberpunk story", but I think they just meant they remember that Bruce Sterling did good things for the cyberpunk subgenre; this is a parallel-world story.) It noodles around with some ideas, a fine short story. (It's strange to write a "Book Report" about a short story. Thanks to electronic publishing, this is a stand-alone purchasable thing. Does that mean I should write a "Book Report" about it to help myself remember it? If payments systems get cheaper and purchasable things get smaller, do I want to write about every little thing? What? You want to know what I thought of the story? Oh, yeah, back to that then.) It's set in Turin and another Turin. It's silly.