The Kiss Quotient by Helen Hoang is a contemporary romance novel that tells the story of Stella Lane, a brilliant mathematician with Asperger's syndrome, and Michael Phan, an escort she hires to teach her about intimacy. As they embark on a series of lessons, their professional arrangement turns into a passionate and unexpected love affair. The Kiss Quotient explores themes of self-discovery, acceptance, and the transformative power of love, offering a heartwarming and steamy read.