The book presents a classification of types of marriage developed by the Author, taking into account the characteristics of the psychotypes of partners, depending on their blood type. Easy and entertaining, and at the same time extremely informative, Author talks about successful or “explosive” combinations of blood groups in marriage. It is interesting that each type of marriage is conditionally tied to some national basis, and the associations that every reader probably has about this matter help to better understand the examples described. The book will be interesting and useful not only for those getting married, but also for everyone who wants to unravel the cause-and-effect relationships in their lives. For a wide range of readers.