To Save A World (Darkover Omnibus)
by Marion Zimmer Bradley
Daw Books Mass Market ISBN/ITEM#: 0756402506
Date: 04 December, 2004 List Price $7.99 Amazon US / Amazon UK /
This omnibus collection of Darkover novels includes the first one written - The Waterfall, along with World Wreckers and Planet Savers.
(Source: Daw Books)