Darkover (Chronological Order) is a 30-book series with 45 released primary works first released in 1958 with contributions by Marion Zimmer Bradley, Deborah J. Ross, Mercedes Lackey, Diana L. Paxson, Cynthia McQuillin, Patricia Mathews, Eileen Ledbetter, Susan Schwartz, Elisabeth Waters, Kathleen S. Williams and 2 others.