A fun weekend hack. The patterns of the blue/green SAT guide are quite funny. Also, there are a few books which don't play nice with amazons image API. And one deleted book! (can you guess which one? Use your imagination :) )
Nice aesthetic. Suggest zooming in to the center 70% of the book cover. It will make it more likely that you can recognize the pattern of the cover. The only cover I can recognize at a glance is 50 shades.