The Marauders read - Harry Potter and the Ch...
"Here it is," James said, "Harry Potter and the Chamber of Secrets."
"As in Slytherins room?" Lily asked curiously.
"Could be," Remus said, "Though I thought that was just supposed to be a legend."
"Even they have truth in them," Sirius shrugged.
"Let's just take it and head back," Peter suggested, "We can discuss this back in the Common Room."
"Good idea," James said, "Let's head back."
The Marauders are in their last year at Hogwarts when the break into the Restricted section of the Library. There they find a seven book series with titles all starting with the name Harry Potter.
Of course, they can't resist and want to read them.