The last hope - bk. 6 (1st ed.)

The end of the stars draws near. Three must become four to battle the darkness that lasts forever. . . .

After countless moons of treachery and deceit, the battle between the Dark Forest and the warrior Clans has arrived. As the cats seek out their allies and enemies, Jayfeather, Lionblaze, and Dovewing wait desperately for the fourth cat who is prophesied to help them lead the Clans to victory—and who may be their only hope for survival.