I am taking the DAT in 2014, and enrolled in the Kaplan course. Should I buy the Organic chem Odyssey by Jim Romano/Orgoman or just buy the "DAT Destroyer" book? Is it necessary to do his DAT bootcamp course which covers Bio also or just buy the book? I am wondering because otherwise I will be studying content and reactions from 3 sources (Chad, Kaplan, Odyssey) where there is a lot of overlap. Who do you think has the most thorough coverage of reactions and other concepts?