The Kiss Quotient by Helen Hoang has the kind of catchy premise that seems tailor-made for a movie trailer. Stella is a successful professional and a bit of a maths genius, but between her constant workload and her Asperger's diagnosis, she feels a bit behind in the romance department. In order to figure things out, she hires Michael, an escort who agrees to help her "practice." Along the way, Stella starts to realise that there are some things that even she can't create an algorithm for.