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Griffin, a newborn bat, thinks he's nothing like his heroic father, until he gets dragged to the Underworld and must find his way home while his father braves the odds to get him back as well.

When a newborn bat named Shade but sometimes called "Runt" becomes separated from his colony during migration, he grows in ways that prepare him for even greater journeys.

Continues the adventures of Shade, a young bat, as he searches for his father and struggles to prevent the evil jungle bat Goth from wiping out the sun.

Dusk, the world's first bat, must lead his colony to safety in a time of changing species.

Matt, a young cabin boy aboard an airship, and Kate, a wealthy young girl traveling with her chaperone, team up to search for the existence of mysterious winged creatures reportedly living hundreds

When his grieving father orders the destruction of the Dark Library, Victor retrieves a book in which he finds the promise of not just communicating with the dead, but entering their realm, and soo