Warriors Super Edition #6: Tallstar's Revenge book by Erin Hunter

A desperate quest for revenge

Tallpaw is a loyal WindClan apprentice who is eager to protect his Clan. But before Tallpaw can complete his apprentice training, a tragic incident leaves his father dead--and Tallpaw consumed by a burning desire for vengeance. Even as he earns his warrior name, Talltail, he cannot see past the anger in his heart.

Though it goes against everything he has been taught, Talltail puts his loyalty to WindClan aside and travels far from home in search of justice for his father. But Talltail's new life outside the laws of the warrior code is filled with danger. . .and he is forced to decide how much he is willing to sacrifice for revenge.