The book "An Abundance of Katherines" by John Green. It introduces the main character, Colin Singleton, and gives a glimpse into the premise of the story. Colin's pattern of dating girls named Katherine and his quest to create a mathematical equation for predicting relationships sets the stage for the novel's exploration of love, friendship, and personal growth.
"An Abundance of Katherines" is a young adult novel that blends humor, romance, and coming-of-age themes. It follows Colin as he goes on a road trip with his best friend and embarks on a journey of self-discovery. Through his experiences, the book delves into the complexities of relationships, the unpredictability of life, and the ways in which people strive to understand and define themselves.