Arco/Peterson's latest edition of the Military Flight Aptitude tests, Peterson's Officer Candidate Tests, Barron's Military Flight Aptitude tests, Marine ASTB math gouge, Gleim's private pilot book, and Kaplan's vocabulary in a box (500 hard vocabulary words from the GRE.) Helped me do pretty well on the AFOQT. Study big tables, instead of the tiny ones in all the flight aptitude books. Best of luck to you. It's a doozy.