This book is dedicated to love, love between people, multifaceted and multi-valued in content and unique in form. From a psychological point of view, love is a very serious phenomenon. Love permeates a person’s entire life, determining his development, attitude, and sometimes the whole meaning of life. It would be strange not to know this most important side of life. This is necessary, first of all, so that love gives happiness to a person, and does not lead to disappointments and, especially, to tragedies. In the new book by Professor Ilyin, the topic is revealed as fully as possible. The publication is addressed to psychologists, students and teachers of psychological faculties, as well as everyone interested.