So the deal is....you must read the book and you must listen to the song! Your world will be much richer for doing so!
This is such a great book...so depressing, but so good.
Evan's best friend Ariel is gone. We don't know where she has gone, but we know that Evan is broken about her being gone and he feels responsible. She was up and down. She was manic, she was depressed. She loved life. She wanted to die. At some point, in the woods, Evan and Jack, Ariel's boyfriend made a decision and now Ariel is gone. We don't know details until the end of the book, and it really keeps you going and going.
The book is based on photos by Jonathan Farmer. Farmer took the photos, sent them to Levithan and Levithan wrote around the stories. Farmer didn't know what Levithan was writing. The result was this incredible book. Here's a nifty little interview for more details. So the book was written in a similar way to Miss Peregrin, but not exactly. I can't find a site for Farmer right now but I will keep looking.
Great book!! Read it!