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.
I recommend you purchase and download your SCJD assignment (if you have not already done so). Then you can see what is required, and start studying the specific areas you need, asking questions in this forum whenever you get stuck.