D'Lacey, Chris. Erth dragons #3

"First published in 2018 in the United Kingdom by Orchard Books... a division of Hachette Children's Books"--Title page verso

The coming of the dragons has upset the balance on Erth, and now other creatures, the wild Gibbus, and the Wyvern, are being drawn into the conflict between dragons and humans; while the dragons Gabrial and Grendel guard the young dragonets in their care, and the human boy, Ren, struggles to control his new powers, the world seems to be coming apart around them--and the firebirds are manipulating the threads of destiny

700L