The Griffin's Feather: Dragon Rider, Book 2 (Unabridged‪)‬

The Dragon Rider returns! 

The last winged horses are on the brink of extinction. At a sanctuary for threatened creatures, the home of a young dragon rider and his silver dragon, three foals lie curled up in their eggs. The foals are in great danger, and the only cure seems to be the sun-feather of a griffin. But griffins, creatures with the head of an eagle and the body of a lion, are a dragon's fiercest enemy, and they live far across the world in the sweltering jungle. A dangerous and exciting adventure begins....