How many of us cut our teeth with a Petzold book on Windows?  Gee, I still have an OS/2 book on Presentation Manager from Mr. Petzold – pre-warp.

Well, MS Press has released his latest book in XPS/PDF form, along with the samples up on the MS Press site.

Free ebook: Programming Windows Phone 7, by Charles Petzold - Microsoft Press - Site Home - MSDN Blogs