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.
A little diversion here for problem solving lovers: Codingame is a site that organizes monthly online coding challenges where hackers from around the world can participate.
The online IDE supports 16 programming languages (Java, Python (3), C/C++, PHP, Ruby, Dart, Go, Objective-C Haskell, Scala...)
Participation is free, anonymous, and participants' code is open sourced after the contest.