The ability to communicate effectively with people is one of the main skills possessed by representatives of intelligence services and competitive intelligence. High-quality communication is a “horse” that they master perfectly. Knowledge of special psychological techniques allows the “knights of cloak and dagger” to easily manipulate people and achieve the desired results from them. This book will lift the veil of secrecy and introduce you to the best methods of hidden influence on people - from establishing acquaintance with them to using their business opportunities. Knowing the weaknesses of your interlocutor, his hobbies or desires, you can always influence him to achieve the desired result. You must be able to create a positive impression of yourself so that no one will guess about your true plans and desires. Every person who builds useful connections must understand not only the rules for establishing contacts with people, but also the principles of keeping the right acquaintances in their orbit interests.