XNA Game Studio 4.0 Programming: Developing for Windows Phone 7 and Xbox 360 (repost)

Get Started Fast with XNA Game Studio 4.0–and Build Great Games for Both Windows® Phone 7 and Xbox 360®
This is the industry’s best reference and tutorial for all aspects of XNA Game Studio 4.0 programming on all supported platforms, from Xbox 360 to Windows Phone 7 and Windows PCs. The only game development book authored by Microsoft XNA development team members, it offers deep insider insights you won’t get anywhere else–including thorough coverage of new Windows Phone APIs for mobile game development.