This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
All topics are covered in quite a lot of details. So it's certainly not only a high level discussion of a specific topic.
The prerequisites are to know a bit about XML and Java. I don't think more is required to read the book and implement the examples.