WordPress Bible
Aaron Brazell
Wiley Pub
I bought this book for the purpose of learning how to customize a WP blog into an existing website.  This book failed.  It was not helpful at all.  The term "bible" connotates it will be a great encompassing reference tool.  It is not.  It did not cover customizing a WP blog in a comprehensible manner at all.  

This book may be about 600 pages with appendices but you can read it in about 3 hours.  I was very unimpressed and was largely a waste of time & money imo.  At this point, all I gained out of this book was how to do a couple plug-ins that are useful.