PoA: Chapters 19&20

This week Snape jumps to all the wrong conclusions and then gets knocked out by three thirds years. Scabbers is revealed to be Peter Pettigrew and we learn that Sirius Black was falsely convicted. Harry says murder is wrong. Then, Sirius invites Harry to live with him after only knowing each other for 15 miuntes (weird.) and Lupin transforms to a werewolf and all hell breaks loose. Sirius gets the dementor's kiss and someone's patronus rescues Harry and Hermionie