The Hallowed Bloodline Series

The Guardian is the first book from The Hallowed Bloodline: series. 

The Guardian is a time travel novel that also features erotic M/M scenes, werewolves and witches.

Twin witches Robbie and Rowan Turner take jobs at a mineral mining company. They soon discover something is lurking in the darkened mine.

Robbie and Rowan are thrown back in time and find themselves stranded in the year 1647 with no foreseeable way back. Robbie is maliciously catapulted forward in time to the year 1918. Separated from Rowan for the first time in his life, Robbie is scared and alone. Robbie finds his young grandfather in post-war Connecticut. He is forced to witness a secret relationship between his grandfather and a man. Robbie learns of the existence of werewolves and knows he will need his brother to help him fight in the battle that has the potential of becoming the next apocalypse.