Code of the Clans is a field guide in the Warriors novel series. Code of the Clans is about the Warrior code and includes an ominous sign from StarClan that signaled the need to patrol borders, the unexpected help from a warrior ancestor that cemented the importance of elders, a secret coup that led to a deputy's new role, a medicine cat's pleas that stopped a spree of inner Clan bloodshed and many more stories.