Erin Hunter 
Warriors #1: Into the Wild 

Epic adventures. Fierce warrior cats. A thrilling fantasy world. It all begins here.Read the book that began a phenomenonand join the legion of fans who have made Erin Hunters Warriors series a #1 national bestseller.For generations, four Clans of wild cats have shared the forest according to the laws laid down by their ancestors. But the warrior code has been threatened, and the Thunder Clan cats are in grave danger. The sinister Shadow Clan grows stronger every day. Noble warriors are dyingand some deaths are more mysterious than others.In the midst of this turmoil appears an ordinary housecat named Rusty who may turn out to be the bravest warrior of them all.