The Wizards of Once (Wizards of Once Series #1)

In the first book in a series by the bestselling author of How to Train Your Dragon, the warring worlds of Wizards and Warriors collide in a thrilling and enchanting adventure.

Once there were Wizards, who were Magic, and Warriors, who were not. But Xar, son of the King of Wizards, can't cast a single spell. And Wish, daughter of the Warrior Queen, has a banned magical object of her own. When they collide in the wildwood, on the trail of a deadly witch, it's the start of a grand adventure ...