Forgot some parts

You asked what are tested.

Here is the set of Kaplan books:

For step 1: (7 books)
Anatomy
Biochemistry
Immunology and Microbiology
Pharmacology
Behavioral Sciences
Pathology
Physiology

For step 2: (5 books)
Internal medicine
Surgery
OBGYN
Pediatrics
Psychiatry & epidemiology & ethics

For both steps, I got First Aid. For step 2, I bought CMDT too (current medicine diagnosis and treatment, very good reference book, will be useful in your future work)

Be determined and devoted, you can make it.

Kaplan books are available if you buy their programs. My experience is: study Kaplan books plus watching the videos (lectures based on the books, very helpful). I got them from Kaplan, spent a fortune. But later found out that some people are selling pirated material, for a lot lower price).