Amazon has two books for Poser listed, one about the Pro Pack and one from Mortier. Syyd gave the Pro Pack book a good review and the other uh.. got really bad reviews. There are a bazillion books for Photoshop, Corel Draw*, Maya, Max, and Lightwave, but hardly anything for Bryce, Poser, and Painter. It would probably make more sense to wait for Poser 5 (will it ever exist?) to write a Poser book, but it seems to me that a good writer combined with some of the awesome artists at Renderosity could write a killer book on Poser. I am kind of surprised no one has done it yet.