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.
Try as many as you can a hold of, then choose one or two and stick to them.
The reason there are so many is that there are so many different preferences between people, noone can tell you which you'd like best (except the purchase department where you work who couldn't care less but just pick one at random often based on who has the best salespitch).