Silverwing saga

In this graphic novel edition of a best-selling story, young silverwing bat Shade is blown off course during his colony's migration to Hibernaculum, during which he meets other winged loners on his journey back to his family, but with a long and dangerous flight ahead, he must figure out who he can trust.

Griffin, a young bat, is sucked into the "Underworld," and his father follows to rescue him.