Torn Between Two Worlds by Lexi Ostrow

Ciara Miller was born the same as others, but she got a little something extra. When she was younger she learned she was a Word Speaker, someone who could create life from stories. Her gift is incomplete until her 27th birthday, before then all she can create is things she, and others like her can see. Evil wants her gift as well and the characters she choses to create become her Guardians against the unseen attackers that want to use her skill. Just before her 27th birthday, fate has a surprise for her.

Stryder is a demon, created to be a backup plan for the Horseman of the Apocalypse, War. Since the day he learned he was nothing more than pawn he and his brothers had been seeking a way to betray hell and fight on the side of the angels. His world is torn apart again when he finds out he’s nothing more than a story and given the option to protect a human female, Ciara, or die.

Ciara hates Stryder for replacing her former Guardian. But she cannot deny the lust and connection that rocks through her every time they touch. She could deny it all she wanted, but she belonged to Stryder and when they find themselves thrown into a war bigger than them both she must choose between her reality bound heart and her fantasy bound soul to save them.