Kurt Jaegers has a new book on XNA 4 Game Development. I´ll review it in a few days, by now, I paste here some word from the author itself:
“This book follows the same style as my previous books on 2D game development with XNA, bringing three different 3D games to life. I cover items such as:      
- The basic concepts behind 3D graphics and game design       
- Generating geometry with triangles       
- Converting height map images into terrain       
- An introduction to HLSL, including writing shaders that handle lighting and multi-texturing       
- Building a 2D button-based interface to overlay on your 3D action       
- Implementing skyboxes for full 3D backgrounds”
 
