There is no better study material than class handouts and my own notes... assuming I showed up for class that hour. And most textbooks are now available online, so I tried to avoid buying any of the books, even the 'required' ones. The books that I did buy merely collected dust on the shelves until I sold them to other students. I wish I had bought more board review series books and used them throughout the first two years rather than wasting time muscling through dense fat books. And during third year, there was nothing better than sharing a pool of books with a group of friends handed down for free from the previous year (etc. blueprints, pretest, recall). Now that I'm a resident, I've dumped almost all the books I spent money on, except for the obvious ones like Netter (free), Harrisons, Stedmans, and Robbins.