The Marauders and the Fuddy Duddiness of Professor R J Lupin

A time travel story. The teenaged Marauders use a time turner to go almost twenty years into the future, just to see what happens. They wreak havoc, of course, and meet some very interesting people, including a certain Defense Against the Dark Arts professor. Set briefly in the Marauders' time and during Prisoner of Azkaban.