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.
The SCJP book by Kathy and Bert gives you lots of questions, and their explanation for the answers are descriptive enough... the best thing about that book is that it gives you the precise explanation for every answer
The significant problems we face cannot be solved by the same level of thinking which created them – Einstein SCJP 1.5, SCWCD, SCBCD in the making