There is no specific book for this exam.
I recommended you to read these:
- start with Martin Karlin's Java Web Services Up and Running, first edition, chapter 1-6, skip the code about Yahoo / Amazon Rest service in chapter 2 or 3 and the code with @Entity in chapter 6.
- Then read Ivan's free notes at https://drive.google.com/file/d/0B-0LAG21gaGDRVBQMFF3VDRVdk0/edit?pli=1 - MZ's notes and quizzes are all helpful.
- Enthuware and EPractice Labs both are helpful.
- Google for some more mock exams from other publishers. That can be helpful too.