Preparing for USABO

Hi. I have been told that I need to read like 9 different books to fully understand biology and get to IBO. However July 26 2018 and the open exam is an extremely short time for 9 books. I understand Campbell is a must and so is Ravens Plants but many other books have been stated as mandatory such as vanders physiology, lehringer biochem, Brookers Genetics etc. So can someone give me a definite list of Books that will give me enough knowledge to get into IBO

Biolympiads has uploaded nice study notes for the top textbooks: https://biolympiads.com/textbook-outlines/. I personally read Campbell and Raven’s.