This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
It really depends. If you still working for J2SE 1.4, you might feel that J2SE Tiger has lots of new features, which is quite different from 1.4.
Thus, in the absence of cert. books on Tiger, you might only rely on JLS, which is not that easy to pass this exam. As Kathy also mentioned before, SCJP Tiger will be much more difficult than that of SCJP 1.4.