Do you feel the AANP questions looked more like APEA or Fitzgerald? To me, it seems that Fitzgerald has some pretty oddball questions that are deep in patho. APEA is more straight forward and to the point.
I think it helps to have a variety of study materials/books. However, on the AANP exam there were several Fitzgerald practice questions from the book on the exam- word for word. So definitely use that one too. Good luck, you will be great!