"Matchmaker" by Charles L. Fontenay is a science fiction novel written in the early 1960s. The story revolves around the efforts of a societal mechanism, known as the Calculator, which utilizes probability algorithms to manage human relationships and solve a pressing demographic crisis. The book delves into themes of love, duty, and the implications of a highly regulated society on personal choices and emotions. The narrative follows Lao Protik, a successful psycho-artist whose life unravels after he becomes embroiled in a conspiracy that leads to his professional and personal downfall. Banished from his career and facing existential challenges, he is coerced into marrying Grida Mattin, a woman with whom he initially shares little connection. Despite external manipulations, Lao's emotions are ignited when he becomes involved with Grida's sister, Alina. The story intricately explores the dynamics of these relationships against a backdrop of governmental control and societal expectations, ultimately revealing profound insights into love, marriage, and the unpredictable nature of human emotions and connections. (This is an automatically generated summary.)