The estimable Mickey Petersen, proprietor of the Mastering Emacs blog, is working on a book. Mickey says that the book is not an encapsulation of his blog but rather is all new material. His announcement has a general outline of what he’s going to cover so read that if you’re interested.
Mickey’s aiming to release the book in February 2015 so we won’t have to wait long. If you sign up to be notified when it’s ready, Mickey will give you 20% off. You can sign up on the announcement page so head on over.