The new XNA books continue to show up on Amazon. This one due November 15th written by Jack Brzezinski

According to Amazon:

"Jack Brzezinski holds a Ph.D. in Artificial Intelligence. He is one of the founders of the Game Development degree program at DePaul University, where he teaches game development courses that involve programming and level design. He is currently teaching a game software engineering course using XNA Game Studio Express. His research areas include game design and artificial intelligence."

Sounds like a quailified guy to write a book and in general Charles River do release good books

Support your favourite XNA community site and buy the book through the amazon link above...