I think if I had to sum up this book in a word, it'd be "irritating". Why irritating? Because while this book isn't nearly as awful as I thought it would be, it's more irritating at how much of its potential that it wastes. 
 The sex scenes in this are rather short for what's often billed as erotica. They last maybe about a page or two at average and are about as graphic as your average romance novel, which is probably why I've seen this sold in many stores on the romance shelves. They're decently written, so I have no true complaints as far as this goes. 
 Where I grew irritated was with how the book was written. Mona Lisa is probably one of the more blatant and worse Mary Sues out there in that she adapts so quickly and effortlessly to various situations without any true drawback. I occasionally found myself being bored by some of the events, as I never felt like there was any true threat against Mona Lisa or her men. She'd always come out on top and she'd always find a way to have her men survive. She adapts far too quickly to various strange circumstances, especially when you consider that she went from being completely ignorant of the supernatural world to becoming a queen and traipsing through various courts within the span of a few chapters. 
 What makes all of this so frustrating is that this had a lot of promise. This felt like it could have been so much more than what it is. The general idea here is good and it's not like the author here is talentless. The start of the novel was pretty good, but over time this just unravels under Sunny's desire to make Mona Lisa the best, brightest, and most powerful of any queen that ever lived. I don't always mind Mary Sues when they're handled just right and this isn't one of those cases. 
 I'll probably check out the next book to see if Sunny tones down the Mary Sue a few notches, as I did like the idea and beginning of the book. It's not so bad that I want to burn my copy or tell everyone to avoid it, but I do recommend getting this via the library rather than buying it outright.