Within These Walls by Ania Ahlborn - She just gets better with each book!

Ania Ahlborn just gets better with each book.  I could not wait for this one to come out and it did not disappoint, that's for sure.  In Within These Walls, we meet Lucas Graham, bestselling true crime novelist, whose life is crumbling to pieces before him. Lucas is given a chance to get his career back on track when notorious cult leader/serial killer Jeffrey Halcomb offers Lucas an opportunity he cannot refuse.  Lucas leaves New York to live at the scene of the cult killings committed by Halcomb himself.  Lucas hopes to get the story he desperately needs, but, Halcomb has different plans.