Complete Champion (3.5e)
Complete Champion focuses on the divine champion archetype and provides new rules options for characters who enjoy battling for a cause¸ defeating foes using divine power¸ and going on quests that mean more than simply defeating the bad guy and grabbing the treasure. This book also helps Dungeon Masters run quest-themed campaigns and adventures.
"In addition to providing various archetypes for characters¸ Complete Champion includes new feats and prestige classes. The book features dozens of deity- and belief-themed organizations¸ turning religion and holy (or unholy) power into something characters of all classes can use. For the Dungeon Master¸ this book contains information on constructing and running quests and holy missions. It assists the DM in helping all characters in the party to pursue divine paths simultaneously.