I searched Amazon and purchased CCM Certification Made East by Deanna Cooper Gillingham RN, CCM because of the reviews. I love the book. I asked this question while waiting for my book and also use the website listed above. They are from the same source and it is nice to have my book or phone to go to as a study guide. I am also using the Kindle version of practice tests(also from Amazon) less expensive and I can practice anywhere. The practice questions have helped highlight my weak areas so I can focus my studying. Good Luck.