Through Time-Whiplash by Claudy Conn

Book #2 in Through Time Series

Why do second chances have to come with complications?
Prince Trevor has one goal: bring the Dark Princes to justice—preferably at the end of his Death Sword—before they can march out of the Dark Realm with an army of monsters at their backs. But complication arise when Trevor is thrown two centuries into the past along with Jazmine Decker, a Fios (a human unaffected by Fae concealment spells) who has more power than either realizes.