A Certain Slant of Light by Hatusu
Rated: Professors [Reviews - 61]
Summary: 
At age fifteen, Regulus Black became sole heir to the largest fortune in Wizarding London. At sixteen, his abnormal intelligence won him entry into the most notorious cult of Dark wizards on earth. At seventeen he made a mistake – one that he would never be able to take back – and his entire world came crashing down.
Enter London, 1979. The story of a boy who managed to defy Voldemort at the height of his regime. But what price did he have to pay?
