The book "Scrum and XP from the Tranches" by Henrik Kniberg was suggested reading for my Certified Scrum Master training course. You can download it for from from InfoQ and I highly suggest you do. It has been out for almost a year now so I am a little late coming across it and I really wish I had found it sooner. The book's format is great in that it is told totally from Henrik's point of view describing how his team adopted Scum (and some XP practices) at his company over one year. It does not have the same rhetoric as a few of the other popular Scrum books, but rather a basic outline of how they implemented the Scrum framework and the basic philosophy around each decision. He never claims that his process is the right way to do Scrum, but the one that worked best for his team. I found it realistic and pragmatic. It is a short read and goes very fast so with it being free you really can't go wrong with this one.