A colleague of mine, Dion Nicolaas, has written what I think is best described as a manual for Scrum: Seven habits of highly effective scrum-teams. The great thing about this book is that it is incredibly practical, a true implementation guide. The subjects discussed are there in enough detail that anyone using scrum will immediately be able to place them, but are very short and to-the-point, obviously coming directly from practical experience. Of course, working at the same company, I know he’s been very successful implemeting scrum in his team.
NOTE: Due to preparations for publishing, Dion’s text is currently not available on his website. It should return in some form in shops at a later date.