The Marauders Read

When Sirius, James, and Remus get a letter instructing them to go to the Room of Requirement, they are not expecting to find a book. They are not expecting what's inside of it- a story about James's son Harry Potter in his third year. And they definitely do not expect what happens during Harry's third year- and it changes everything. The Marauders Read: The Prisoner of Azkaban.