The Heart Of A Warrior - By Erin Hunter

Ravenpaw and Barley helped their friends in ThunderClan defeat the vicious BloodClan cats in Twolegplace. Now they're ready to fight to reclaim their home on the farm. Firestar has promised to send a warrior patrol to assist them, but Ravenpaw worries that it won't be enough to chase out the invaders. He knows that he must find his courage and fight like a warrior—or lose his home forever.