Are there any Good books series to read?

[ryoder]

Yes there are.
The REA books are superb. They are all you need to pass, but to supplement, use instantcert flash cards and the exam specific feedback forum on this site available to paying members.

Here is my process. Buy the book. If you know something about the topic, take one of the practice tests but only do 20 questions. Determine your grade on those 20 questions. If you get over half right you are probably going to be able to read the book, take a practice test or two and pass with a good grade. If you are way under 50%, then you will need to read the book, take a practice test, study the questions you got wrong, retake, take another practice test, restudy etc.

Learning is a process so hone your process on your first few tests and pretty soon you will have passed 10 CLEP tests in two months.

Make sure you read the entire book. And read the detailed answers to the practice test questions.

Amazon.com: clep rea