Judith Rumelt (born July 27, 1973), better known by her pen name Cassandra Clare, is an American author of young adult fiction, best known for her bestselling series The Mortal Instruments.
Fifteen year-old Clary Fray's life is turned upside down when she tries to stop what she thinks is a random knife attack at an underage dance club. The knife-wielding punks she follows into a storage room are actually Nephilim, creatures that are half angel and half human, and the boy they attack is a demon.
