Books you miss during quests should be moved outside the delve or rooms that you get locked out of. Look where you either turn in the final part of the quest, or just outside the delves. Sometimes they are at the beginning, but you should see a cluster on a bench or the ground or something.
Enjoy the game, life is what you really want to be worried about.
PakKat "Everything was going well, until I died"
Gary Gravestink "I am glad you died, I needed the help"