Mr. Penumbra's 24-Hour Bookstore - Robin Sloan
The most delightful book I've read in a long time. That's partly because so much of it just clicked with my interests - books, fonts, Google and the digitization of the world, the Ruby programming language, and mysteries. It was the humor that made it particularly fun, though. If you like Terry Pratchett or Douglas Adams then you might like this book also, but it's a real story in the real world rather than fantasy.

I see a lot of other reviewers have dinged the book because of flat characterization, lack of tension in the plot, "juvenile" writing and so on. OK, maybe it's not as artistic as Kafka's "The Castle," which I finished just before reading "Mr. Penumbra...," but it was sure a lot more fun :-)