Jennifer Ealey 
The Wizard’s Curse [EPUB ebook] 

As civil war spreads through the realm of the sorcerers, the woodwolf become under attack by unknown abductors. When his attempts to prove his loyalty and protect his people go disastrously awry, Sorcerer Prince Tarkyn finds himself distanced from his companions and threatened by a curse.
Trying to save his new people from his vengeful twin brothers, Tarkyn faces pressure from sorcerers and woodfolk alike. Soon, he is drawn in a battle he’s not ready for.
As the curse threatens to corrupt the woodfolk and loyalties around him grow thin, can Tarkyn wield his powers to save his people?