No one, and I mean no one, can write a submissive character quite like Kari Gregg. Gabriel is amazing, and Cal seriously knows how to dominate the man. The sex between them is beyond hot, but it wasn't just the sex scenes. Everything about their dynamic is just so intense and erotic.
My main gripe is that I wish the book was longer. I would have liked more world-building, and definitely more of an ending. That being said, it's one of my favorite books.