One of key works on psychology on a theme leadership, book Erica Берна accessible and evidently describes the structure of different groups - from such large, as the state or labour collective, to tiny - as family. The unique secrets of efficiency of existence of groups, achievement of the personal and group social success, sources and mechanism of becoming of leadership, are collected in a book. Opening the world of cross-coupling, described by Eric By Bern, you will look at itself outside and will learn on a maximum to use those unique properties that you is given to from nature, - optimize all skills, talents, energy. The methods of author will help to analyse the position you in society and take the deserving place in life.In the format of a4.pdf is stored publishing layout.