Firewing by Kenneth Oppel

In this thrilling adventure, a young bat named Griffin embarks on a perilous journey to the underworld after a tragic accident separates him from his family. Guided by his father's legacy and the wisdom of newfound allies, Griffin must navigate a realm filled with danger and mystery to reunite with his loved ones. Along the way, he discovers the strength within himself and the power of hope, courage, and friendship in overcoming the darkest of challenges.

Purchase from Bookshop.org