The Light Within. Irin Knight, #1

In remote mountain town, a battle will be fought for the survival of the world. Lawrence 'Tagg' Taggart is a young man who feels his life has no purpose. He is kidnapped by cultists and targeted for sacrifice. Instead, he is changed and is now connected to the alien, other-dimensional energies used by the cult. Brenna is being trained by her uncle in the mountains of West Virginia to be an Irin Knight, a defender of humanity.
No matter how hard she trains, she cannot access the Light, the mystical power which is the heart of the Irin. She wonders if the Council of Elders is right and that a woman can never be a Knight. After Brenna saves Tagg's life, drawing them together, they discover that the cult has been working under their noses all along. The cult worships beings of the Outside, a dimension surrounding our own inhabited by creatures that desire to consume all realities.
The cult has been secretly growing in strength for years and its powerful leader stands on the brink of opening a gateway for the horrors from the Outside. Faced by fanatical cultists and their deadly mechanical constructs Tagg must embrace his newfound abilities and Brenna must awaken her link to the Light or the cult will succeed in opening the gateway and our world will be consumed. A fast-paced urban fantasy.
Do you like fantastic adventures laced with magic and a touch of horror? This series combines the urban fantasy feel of the Dresden Files with a touch of the cosmic horror of H. P. Lovecraft.