Veil of Shadows (Warriors: The Broken Code, Bk. 3)

ThunderClan's leader Bramblestar, has been possessed by the spirit of a sinister cat intent on rooting out and exiling codebreakers--cats he claims are irredeemable traitors to the warrior code. And though a small but growing number of cats have begun tok resist his tyranny, tensions among all five Clans are on the rise . . . and many soon erut into outright war.