Harry Potter and the Chamber of Secrets

In the second book of the Harry Potter series, there is a hidden chamber somewhere in the castle that has a dark past. After some students keep getting mysteriously petrified, the Ministry wants to close the school. It is up to Harry, Ron and Hermoine to figure out the secret of the chamber. This book is worth reading since you learn more about Harry's past and of Voldemort's past and connection to Harry.