The SOCRA website has some practice questions. http://www.socra.org/
I would not buy the book, but when you register for the exam they will send it. The same material is also available on line at the FDA and ICH
The FDA CDER web has easy access to the relevent regulations 21 CFR 312, 50, 54, 56, 318. See: http://www.accessdata.fda.gov/script.../CFRSearch.cfm
The ICH recommendations (esp E6/GCP) has all the information and easy access. See: http://www.ich.org/cache/compo/276-254-1.html
The exam was very basic and if you are comfortable with the regulations, a medical back ground and some common sense you should easily pass the exam.
Also any book on Clinical Trial Management will cover the basics of research as interpreted by the CCRP exam.