Pro Drupal Development by John VanDyk and Matt Westgate

John VanDyk and Matt Westgate are nearly finished with their Drupal book, which can finally be pre-ordered on Amazon.com. This book will be exceptionally useful to anyone who wants to understand Drupal from a programmer's perspective. This book sets new standards for writing about Drupal, and will be one of the most worthwhile tech books you buy. Great work, John, Matt!