Thunder, Wind, River, Shadow and Star: the clans
Territories: homes and hunting grounds
Cats outside the clans: Kittypets, Rogues, and others
Other animals: animals to hunt, fight, fear, and respect
The Warrior Code: the principles a warrior must live by
Ceremonies: how a warrior becomes a leader
Prophecies and omens: foretelling the future
Medicine: healing the clans
Mythology: Lionclan, Tigerclan, Leopardclan