Harry Potter and the Chamber of Secrets

(Reread, obviously)
This was always my least favorite of the series, not to say it is a bad book by ANY means. It's just the one that gets forgotten about. As a child, if I was going to rank the book series in terms of favorites, this one would have been at the bottom. Now, as an adult revisiting it for the first time in years, I was loving it. There is so much richness of character and story here. My favorite scenes include, of course, the flying car, every scene with Lockhart bungling his way through teaching, and the exchange between Tom Riddle and Harry. I was laughing hysterically during the Valentine's Day scene. This book gets forgotten a lot, but it is absolutely the funniest in the series and rightfully earns its place among the other installments.