The Fall of the House: Red Room, Book 3 (Unabridged‪)‬

From the best-selling author of The Rules of Supervillainy:

Derek Hawthorne has slain Dracula and stopped the malevolent plan of his own employers, the sinister House. However, he has discovered that his ex-partner and lover Ashley Morgan has been kidnapped while a new conspiracy moves to expose the supernatural to the world. The House has overplayed its hand and all of its enemies are coming to bring it down. Derek will have to travel dimensions, fight monsters, and call in every favor he's accumulated just to survive.

The Fall of the House is the exciting conclusion of the Red Room trilogy, tying the series to the greater United States of Monsters universe (Bright Falls Mysteries, Straight Outta Fangton, and Brightblade).