The Templar Treasure by Katherine Kurtz and Deborah Turner Harris 1 July 1993 by librarian 0 “The Templar Treasure” by Katherine Kurtz and Deborah Turner Harris. Title: The Templar Treasure Series: The Adept Number in Series: 3 (three) Authors: Katherine Kurtz, Deborah Turner Harris Cover Artist: Bryant Eastman Language: English Publisher: Ace Books Published: July 1993 ISBN-10: 0441003451 ISBN-13: 9780441003457