Silverwing #1

Shade is a young Silverwing bat, the runt of his colony determined to prove himself on the long and dangerous winter migration to Hibernaculum, millions of wingbeats to the south. During a storm, Shade is swept out over the ocean -- away from his family, his friends, and the only life he has ever known. Alone and frightened as winter fast approaches and temperatures plunge, Shade sets out on a remarkable journey to rejoin his colony to the south.