Billionaire Bad Boy Daddy is a fast paced spicy romance between Rex and Isabella. It is a super read and will keep you hooked. My only complaint is the title I find misleading. It is mentioned that Rex has money, and he is a Dad, however I expected your typical billionaire Daddy and that is not Rex. He also isn't really a bad boy. Saying all that though I would still recommend this book. 
4/5 story
3/5 spice