Rise of the Gatekeeper (Book 3 Guardians of the Gate Series)

Something is terribly wrong! An evil sorcerer has figured out how to time travel and Jenny has to go back to the year 1347 to stop him. A dark wizard who could be far more dangerous than the sorcerer Rudigor. A wizard who is using the power of Jenny?s beloved mentor Gwenelda in his evil schemes. Has Gwenelda turned to dark magic? Is she helping this wizard topple the entire Gatekeeper Fraternity? Jenny will stop at nothing to find out the truth, no matter how dangerous it gets. Even if it means risking her very life.