The Ember's End

In the shadow of the unforgiving Wyrmspine, four orphans have forged something rare: a family. Viseryn, Korath, Brenn, and Sylva, known as the Wyrm's Teeth, have survived avalanches, brutal winters, and the weight of their own losses. When a wounded dragon hatchling falls from the sky during the annual Stoneclash tournament, they make a choice that defies the mountain itself. They save him. Now the peaks are waking.
Ancient tunnels stir with old hunger, and a prophecy of "Fire or Ash" begins. Some bonds are forged in fire. Others must be tested until only ash remains.