To prepare for the exam, I ordered both the Gleim and the King courses. I really had my heart set on a score of 100 because I new all of the material inside and out...at least the answers to all 500+ questions and the reasoning behind those answers. I was a little surprised to find about 5 questions that I really had no clue as to the answers. Still though, for me, the King course is the way to go. It was MUCH easier to understand than simply reading books.
Sport Pilot Airplane Ground School & Test Prep