The Battlemage (Summoner #3)

The Wyvern turned, its eyes focused on Fletcher, and he suddenly realized how puny his sword was against the monstrosity before him. He backed away slowly. His knees trembled with exhaustion, barely able to bear his weight. He could hardly stand, let alone run. Fletcher and his classmates from Vocans Academy—including the elf Sylva and the dwarf Othello—travel through the ether, where they must pursue a mortally dangerous quest to rebuild their world and broker peace. As he leads a small army of soldiers, Fletcher will face his biggest challenge yet: his nemesis, the albino orc, Khan, who seeks to destroy everything Fletcher loves.