Wilds

From the publisher: The wild frontiers of demon-haunted forests, sun-blasted deserts, windswept glaciers, and rolling plains are now open for adventure with this exciting d20 sourcebook. Features include guidelines for constructing wilderness adventures, complete with ready-made encounters, new creatures, rules for weather, and other effects unique to the outdoor environment, plus new prestige classes, feats, and skills tailored to exploring the wilderness.