I just took the CCM exam last week. I studied the glossary off the CCMC site. I studied the Case Manager's Handbook by Catherine Mullahy, and the Case Managers Study Handbook by Denise Fattorusso. I did the test and read the books several times. The test is odd and more critical thinking. My preliminary results was pass. I took it four years ago and failed. I was new to case management and did not study. It seemed easier this time.
If you've been a case manager for four years, you know a lot more about it now. So many people think they'll take a certification examination that is supposed to demonstrate expertise in a specialty without ever having worked in that specialty. If you have a reasonable experience in a specialty, you ought to be able to pass the cert examination. Congratulations!