Yay! And I wouldn't consider it unfair. First of all those dips were not necessary, secondly those book were not so small that no one could possibly know what they were about and thirdly, if really needed, wikipedia is just a few clicks away to give a little background. And it really was an enjoyable round! Great job with the clues!
Anyway, next round is presented by Metallica (just a fun fact, no hidden meaning):
1. Nothing else matters