First of all Blender version 2.5 Alpha 0 is out please download it.
There will be series of updates in this version like Alpha 1 and than Beta 1 , 2 , 3 and than finally Blender version 2.6 on mid 2010.
If you are having any problems with UI and shortcuts for the new version than check this tutorial-
Here are the links to download some of the books which i have got ( .pdf and .html)
Blender for Dummies -
Blender Gamekits 1 and 2
Bounce, Tumble, and Splash! Simulating the Physical World with Blender 3D
Foundation Blender Compositing
Animating with Blender
For all Blender hot keys and reference
This are some good books especially game kit 2 and bounce tumble and splash i would say must read.