Fix typos and duplicates in book names

Hey John, I love your bib.ly project and hope you'll let me help clean up the code base a little. I've noticed some typos and duplicates in book names in bib.ly. If you like these changes and you're willing to let me help develop, I have a few other ideas that I may throw additional pull requests for. This is my first pull request on Github, so I'm trying to start simple. Let me know what you think. Cheers!