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.
Try this one, it has a lot of info.
google concurrency and go through the java.util.concurrent API
better read and practice a lot before you do your real one, because threading can be tricky to start with.