The Kiss Quotient by Helen Hoang
The Kiss Quotient by Helen Hoang ($12) follows Stella Lane, a mathematician with Asperger's who's on a mission to learn everything she can about dating and intimacy, and Michael Phan, the escort she hires to teach her.
I think this was the first book I ever read featuring a lead with a Vietnamese background, which I really loved as a Vietnamese-American myself. Michael's family on his mom's side is Vietnamese, and I loved the use of Vietnamese dishes and familial titles throughout the story. It's a fast and steamy read!