By the Horns (By the Horns #3)

After defeating the western wind mage, Elodie and Sajen have a new mission. But to track down the other sorcerers they'll need to put their trust in the floating eyeball named Evelyn to guide them across the continent. Plus, Sajen has his work cut out for him if he wants to prevent Elodie from killing their unicorn travel companions, Zoso and Rigby.