Guardian of the North - Descendants of Robin Hood, #1

Eight hundred years ago, the Sorcerer Guy of Gisborne laid a trap for Robin Hood. But the curse backfired, releasing a burst of pure magic energy. Now Robin Hood's descendants carry this magic, manifesting in the form of elemental powers. Jack is the last Wind Rangerian standing. On the night his power Manifests, his home court Fort Calmier is attacked by the rival Ealdra. Realizing the rogue Sheriff has come to claim the last Wind, Jack flees.
The Ealdra have found something, a secret weapon they need the four Winds to claim. With his Master murdered and a traitor among his trusted friends, Jack is on the run, fleeing Hunters, sorcerers, and a mysterious girl of the shadows while he struggles to control the roiling North Wind inside him. How far is he willing to go to protect his nation?