Hello everyone. I'm new comer. I'm going to take MDCAT test, I don't know how to prepare for it and I hope to receive some help.

Could you please suggest me some names of books that are useful for revision?
I asked the same question on several forums, and I receive some advice that I should install http://appnaz.com/android/step-by-pgc-edu.pgc.step.step . Have you used it? Is it good and reliable? Are its questions are the same with those in MDCAT test? (now exactly the same). I have taken some online tests but I think they are not enough. I need more.
And do you know some online course? (If yes, how about their price and quality?)
Thank you very much.