The Kiss Quotient is a heartwarming romance novel written by Helen Hoang. It tells the story of Stella Lane, a brilliant mathematician who has always struggled with relationships. Determined to improve her skills in the bedroom, she hires a male escort named Michael Phan. As they spend more time together, Stella and Michael develop a deep connection that goes beyond their initial arrangement. This book explores themes of self-discovery, acceptance, and the power of love.