Reformation

After 7 years of voluntary exile from the magical world, Sirius Black decides to return and help the Blacks solve Regulus' disappearance. Meanwhile, ex-werewolf-soldier Remus Lupin is hired as a secretary for Black Enterprises, and little Harry Potter is bewildered by the appearance of a stranger at Number Four, Privet Drive. Gen. Very AU. Black family centric. Smart!Voldemort