You are not saving the books file which you read as one string at line 3 anywhere. Why are you splitting then input from user for title from '/'? Your example seems not allow '/' in title as it separates author from title.
pyTony
pyMod
6,310 posts since Apr 2010
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pyTony
pyMod
6,310 posts since Apr 2010
Reputation Points: 879
Solved Threads: 986
Skill Endorsements: 26