Per. from France. — Monograph . M. : World, 1981. 240 s. The book of the French astronomer Paul Couto is a small but informative guide to the observations of visual-double stars, the calculation of their orbits, masses and dynamic parallaxes. The purpose of the author is to describe the fascinating world of double stars and attract professional astronomers and amateurs to their observations. A valuable addition to the book is a catalog of 744 visual binary stars most convenient for observation. The book will be usefully read by astronomers of all specialties, amateur astronomers, teachers of astronomy in high school, members of astronomical circles.