Shadow of The Dragons — James E. Wisher

Ten years have passed since Otto Shenk sent the spirit of Amet Sur to the Netherworld. The New Garen Empire is at peace and Otto is free to pursue his magical research. But all peace is fleeting and while Otto is away from the capital, a bizarre monster attacks, doing considerable damage before meeting its end. Furious that anyone would dare attack his home, Otto makes up his mind to find whoever is responsible and ensure they won't be a threat again. His search will take him far across the ocean to the dark jungles of Aztecaland. A place where death hides in every shadow. Can Otto hunt down and defeat this new foe? Find out now in Book 8 of The Portal Wars Saga.