"The Book of Brother: A Romance of One Marriage" is a novel by the Swedish writer Gustaf af Geierstam. In this literary work, the author tells the story of family ties, shades of the psychology of interpersonal relationships, and difficult problems that arise in long-term relationships. The main characters are a husband and wife, who are united not only by warm relations, but also by a number of difficulties that they have to face on the way to life together. Gustaf af Geierstam's novel will touch the subtlest streams of family life and show that every marriage is a unique story that requires understanding, patience and mutual support.