Book 18 was East of Eden. Why did no one make me read this book before???? It was beautiful. Due to an odd high school curriculum, I was never assigned a great number of books that most reasonably well-read adults have been made to read at some point. I have to thank Mumford and Sons for writing a beautiful song that interested me in reading the book that inspired it. I'm now off to find a list of other books that I should have read a long time ago, and am looking forward to some great discoveries.
Also, when reading a book that everyone assumes every other adult has already read at some point, be aware that people will try to spoil it for you. I had to talk over two people on two different flights who wanted to talk about their favorite parts of the book -- parts I hadn't gotten to yet! They both looked skeptical when I said I was reading it for the first time, and please don't tell me how it ends.