Moon World by J.R. Rain

Samantha Moon finds herself in a world of trouble… literally.

Being trapped in an alternate dimension is not usually a problem for her. Unfortunately, the reality around her came from the mind of Quentin Arnbury, an author with a penchant for being wicked to his characters.
Here, people don’t simply die… they die horribly. Worse, with Quentin incapacitated, his world is no longer following any script.
Surrounded by nobility that embodies avarice and violence, it’s only a matter of days before the darkness attached to Quentin’s mind consumes his psyche as well as the world he created. Even if Sam can manage to survive in such a dangerous place, reality is unraveling around her.
With time running out to free Quentin’s soul, Sam takes a dangerous risk: trusting a dark master.