Kenneth Oppel 
Kenneth Oppel Silverwing Series: Four-Book Bundle [EPUB ebook] 
Silverwing, Sunwing, Firewing, and Darkwing

In Silverwing, Shade, a young Silverwing bat, gets separated from his colony and must set out on a dangerous journey to find his way back to them.Shade’s story continues in Sunwing, as he travels to the far southern jungle, where he will do all he can to find his father-and save the world from eternal night.In Firewing, Shade’s son Griffin is sucked into the Underworld, and Shade must save him before a deadly foe finds him first.<p.Sixty-five million years before Shade’s adventures in Silverwing, Dusk fights his urge to flap and Carnassial gives into his instincts to become a vicious predator in Darkwing.