For as highly populated a book as FFM is, there's a distressing scarcity of suspects. I tried to make it not too obvious, but...oh well.

Originally posted by Andrew:
[B]In the Mystery Bookshop, by the way, Barbara, were two odd-looking vols labelled "uncorrected proof copy, not for sale under any circumstances". They cost somewhat more than the copies I bought.

Those were Advance Reading Copies that are sent out to booksellers and reviewers, to help them decide whether they want to sell/review the book by the time it is officially released. Even though the publishers forbid their sale, they're sold all the time. The Seattle bookstore owner probably just put a price tag on his own ARCs, or maybe he picked them up at an auction somewhere. Personally, I don't see why anyone would want an ARC instead of a finished copy.