Henrik Kniberg and Mattias Skarin wrote the eBook Kanban and Scrum -making the most of both, its great to read and really helps if you're used to a scrum process. The book really reads smooth and the 120 pages are devoured in a couple of bus rides commuting to work. I like the short chapters and the easy, simple graphics.
Nice work. Seems there's also the Scrum and XP from the trenches from Henrik, sure I'll read that one next and besides the book, Henrik's blog and Mattias's blog are also very interesting reads.