Library project w/spec by Kathryn Beaty

I also did the extension to add reviews to books and then allow borrowers to get the reviews. I included my rspec with the slight changes for errors in it. You can find both library.rb and the spec in the Library-master folder. I also ended up pushing my Cookbook project here accidentally, as you can see below. I look forward to feedback and let me know any questions you have. Thanks.