“Clary saw him take Mark's hand; he pressed his witchlight into the boy's palm, where it flickered, and then resumed its steady glow. 'Take this with you,' said Jace, 'for it can be dark in the land under the hill, and the years very long.”

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.