Hey I am not sure what is a good book or not I used Kaplan, Mosby, and Pearson and I failed! my test was all on medications I never heard of, I didnt get any OB or PEDS or even 1 math problem, I had 90 questions all on teaching of meds. I decided to do a online teaching through nscbn, hope this works and I plan to retake the exam in September. Well good luck to u, keep trying to smile and keep your head up!