Good Study Guide and very helpful being able to test. There are, however, some flaws both in some information in the guide and in the tests. The test are inconsistent in their summary results after having looked at details, e.g., initially had 10/12 correct, but after review, comes up as 11/12 correct. Also, some questions are glitchy, e.g., question asks you to choose TWO, but only 1 can be chosen. But overall, the book/tests helped me a great deal in studying for the test (along with another website and 3 apps). I passed the first time, easily.