Read for the seventh time. 
 This is my favorite of the HP books. I just love all the backstory surrounding Moony, Wormtail, Padfoot, and Prongs. Remus Lupin is one of my favorite characters in the series, and he and Sirius really get the spotlight in this book. (I was not happy when I saw the third movie; I couldn't believe they left all of this out!) Such a fantastic part of the story. Sorcerer's Stone and Chamber of Secrets are just really good fantasy books, but I think this is the first one where Rowling really shows us how good she is.