“Simon," said a voice at his shoulder, and he turned to see Izzy, her face a pale smudge between dark hair and dark cloak, looking at him, her expression half-angry, half-sad. "I guess this is the part where we say goodbye?”

Cassandra Clare is an American author of young adult fantasy. She gained prominence for her *Mortal Instruments* series, blending urban fantasy and gothic romance, and later expanded her world with the *Shadowhunters* novels. Her work explores themes of identity, destiny, and hidden supernatural communities.