You can find list of preparation materials on:
-MB7-700: www.microsoft.com/.../exam.aspx (80438A)
-MB7-701: www.microsoft.com/.../exam.aspx (80535A, 80439A, 80434A, 80435A and 80534A)
-MB7-702: www.microsoft.com/.../exam.aspx (80437A)
You can find all of them on: www.microsoft.com/.../microsoft-dynamics-training.aspx
You can also find many documentations on MSDN: msdn.microsoft.com/.../hh173988(v=nav.70).aspx