Darkness Falls (Erin Hunter's Survivors Series #3)

Every dog must stand together—or their new world could destroy them.

The Wild Pack's ruthless Alpha has reluctantly agreed to allow the Leashed Dogs to join his Pack—but not before casting Lucky out forever for his role as a spy. Lucky quickly realizes that this new world is treacherous for a Lone Dog, and for the first time since the Big Growl, he is desperate to have other dogs by his side . . . if it's not too late.