Set in the world of Harry Potter, the story follows a young wizard as he is forced to go on an epic quest to save humanity.The "Fool Moon" is one of the four books that make up Harry Potter and The Wizarding World series. It takes place during the same time as "Harry Potter and The Goblet of Fire." Harry's godfather, Sirius Black, has just been murdered by Voldemort. With no clues to his death besides a cryptic note left by Sirius himself, Harry has to figure out what happened.Jim Butcher began writing this book in 2008, but did not publish it until 2013. He decided to do so after being asked if he wanted to write some prequels for his series when it was still ongoing.