NEW YORK (AP) — Million-selling young adult author Cassandra Clare has a signed up for a new fantasy series.Simon & Schuster Children's Publishing imprint Margaret K. McElderry Books announced Tuesday that Clare has agreed to a three-book deal for "The Dark Artifices." The series is set in modern Los Angeles from the nightclubs of the Sunset Strip to the beaches of Santa Monica.Financial terms haven't been disclosed. But an official with knowledge of the negotiations tells The Associated Press the deal is worth in the high seven figures. The official wasn't authorized to discuss the contract and asked not to be identified.Clare is known for the series "The Mortal Instruments" and "The Infernal Devices." Her books have sold more than 6 million copies worldwide.