I give it 4 stars because I actually stayed up to finished the book. And any books could do that deserve at least 4 stars in my opinions. 
 However, I do wish that the book are longer, and perhaps more in dept. I found myself wanting to learn more about the two characters. It would be great if its a series. 
 Now, even though it said its BDSM, I actually though compare to other BDSM books I read, this book hardy penetrate that. Also, he really isn't a hardcore Dom (again, compare to other BDSM characters I've read.). But I did enjoyed this book, hence I couldn't put it down and had to finish reading in one installment.