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.
If you are having good touch with Java, then its better go for 'Kathy Sierra and Bert Bates-scjp 1.5' book which will be enough for the exam. If you are not familiar and new to Java its better to go through 'Java Complete Reference' at first.