Day 13 - One under appreciated book EVERYONE should read.
I don't really know if this counts as under appreciated since it was turned into a movie, but...
Percy Jackson and the Olympians.
Though I'm not done with the entire series yet, the past couple of book from the series were easy and fun reads. They can be cute and adventurous at the same time because everything is died down to moderate on everything vulgar and brutal. It's a very light and an extremely fun read, if you're into that young adult action packed kind of books.
Let me know what books you think are under appreciated.