The Blender 2.3 Guide is latest book covering features up to Blender 2.32. This book starts with a quick tutorial to get you started with Blender. The Blender Gamekit is aimed at people who want to learn to use Blender's real-time engine, as opposed to rendering stills or animations.
Both books are available in our E-Shop.
Online documentation of Blender can be found here.
There are many community-driven discussion boards where you can ask questions, or give answers related to using Blender. See the Help Forums section of this site for more information.