If you are referring to the
Java 2 Study Guide by Kathy Sierra and Bert Bates, then I am pretty sure you have the best book out there. I looked at several while preparing to take the exam, and in my opionion, this one stood head and shoulders about the rest. The practice exam questions are very similar to the real questions you will see on the test, and the two minute drills at the end of each chapter are great for last minute reviewing.
Also, if you plan on taking some of the avdanced exams, check out the "Head First" series by the same authors (Although Bates is listed first). They take the idea of making a technical book enjoyable to read one step further. I have Head First
EJB, and I believe Head First JSP/Servlets is due this summer.
“Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.” - Rich Cook