"In Harry's third year he must learn the many truths about the new DADA teacher, Professor Black, and an escaped convict, Remus Lupin."Another Prisoner, Another Professor is a Harry Potter Fanfic, written by Marauder. It starts off as a retelling of Harry Potter and the Prisoner of Azkaban, with one difference: Sirius Black and Remus Lupin have switched places.A simple premise, but this fic does more than switch the names around. It comes with its own subplots, and is written in precisely the same style as J. K. Rowling.
Summary on FanFiction.Net
Another Prisoner, Another Professor provides examples of the following tropes: