Recently has been released the first stable version (1.0) of Wordpress for Blackberry, which includes many great features

WordPress Plug-in Development (Beginner's Guide) focuses on teaching you all aspects of modern WordPress development.

A brief overview on main changes to the platform brought by version 2.9 "Carmen".

Wordpress 2.7 Cookbook by Jean-Baptiste Jung is collection of useful recipes to take control of your WordPress blog layout, themes, widgets, plug-ins, security, and SEO.

A book about photoblogging with Wordpress by David D. Busch: an instant start-up manual for creating and managing a photoblog

An overview on Wordpress 2.8.5 version, containing important security updates.