Blood of Dragons (Rain Wild Chronicles #4)

The dragons' survival hangs in the balance in the thrilling final volume in the acclaimed River Wilds chronicles fantasy series
The dragons and their dedicated band of keepers have at last found the lost city of Kelsingra. The magical creatures have learned to use their wings and are growing into their regal inheritance. Their humans, too, are changing. As the mystical bonds with their dragons deepen, Thymara, Tats, Rapskal, and even Cedric, the unlikeliest of keepers, have begun transforming into beautiful Elderlings raked with exquisite features that complement and reflect the dragons they serve.
But while the humans have scoured the empty streets and enormous buildings of Kelsongra, they cannot find the mythical silver wells the dragons need to stay health and survive. With enemies encroaching, the keepers must risk "memory walking"- immersing themselves in the dangerously addictive memories of long-deceased Elderlings - to uncover clues necessary to their survival.
And time is of the essence, for the legendary Tintaglia, long feared dead, has returned, wounded in a battle with humans hunting dragon blood and scales. She is weakening and only the hidden silver can revive her. If Tintaglia dies, so, too, will the ancient memories she carries - a devastating loss that will ensure the dragons' extinction.