War of the Dragon (Dragon Riders of Elantia, #4)

Worse, the Zallabarians are cutting a swathe through the country, mowing down the Elantian army as they head straight for the capital. The only chance Zara and Tavarian have at stopping them from destroying Elantia lie in the recovery of the missing dragons.

But finding a horde of dragons that have vanished into thin air is no mean feat, especially when it involves heading straight back into enemy territory. And when Zara stumbles onto a secret regarding the next piece of the dragon heart, she must make a terrible choice between saving all of dragonkind, or saving the world…