She's a prim-and-proper nerdy girl hiding her reckless desires.He's a reformed bad boy trying to win her heart.Gabriella Evans needs to get her head on straight. A PhD candidate, she doesn't believe she can be both a successful mathematician, and have a life filled with wild passion.Connor Starks has spent years breaking laws and breaking hearts, but meeting Gabriella makes him want to prove he's become a better man. The only problem? She's driving him out of his mind.But Connor will discover his past can't stay hidden forever, and Gabriella will find out how much fun it is to be bad...If you're looking for SCORCHING HOT SEXUAL TENSION that sizzles through the pages, and a sexy as sin story that's a perfect blend of naughty and nice, grab this standalone romance now!Summer romance ?Dirty talk ?Spanking ?Motorcycles ?Tattoos ?A rebellious nerdy girl ?A bad boy who's turned good...or at least he's trying ? An Amazon Top 100 Bestseller in Erotic Romance"Hot and spicy, this romance was written for all of those readers who like both the good - and the very bad." - Library Journal"In The Duality Principle, Rebecca Grace Allen introduces us to one of the sweetest reformed rakes ever." - Heroes and Heartbreakers"Allen's debut is an utterly charming, delightfully dirty little tale that shouldn't be missed." -4 1/2 stars, RT Book Reviews