This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Here's a problem that asks you to create XPath expressions for a given XML file. A solution is also given, if you want it, but it's not perfect. Might be a fun thing to do. At least I had fun solving it :-)