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.
You'll find a lot of answers to your questions in this site's SCJP FAQ.
The de facto standard study guide is SCJP Sun Certified Programmer for Java 5 by Kathy Sierra and Bert Bates, both of whom helped co-develop the SCJP exam itself. You'll often see this book referred to simply as "K&B" on this forum.