If you are in need of a resource to study for a Praxis Test....do not buy the books written by ETS. They are a waste of money and provide you with no insight of how to study for these tests. Basically , these books tell you to know everything. I think Barron's puts out the best books to study for Praxis Exams....at least on the elementary level. I got the Barron books for the Praxis.....followed their advice and passed the exam . I do not recommend the books by ETS.