Valley of Silver. Dragon Charmers, #2

Sequel to Mountains of Fire In a world where dragons can be sung into submission by dragon charmers, people have forgotten the true power of dragons... and they are about to pay the price. In the exciting sequel to Mountains of Fire, the spell binding the fearsome Red Dragons is weakening, and when they break free they will seek a terrible revenge. With the help of Silverhorn and Braveheart, Logan and Alyxa flee in search of Logan's long-lost parents, who hold the key to defeating the red dragons.
With Logan unable to do magic, and his elderly wizard grandfather losing his memory, the future looks grim... But Logan refuses to give in and together with Alyxa, Myles and eric he battles the red dragons once more.