"Diplomatic Immunity" by Robert Shackley is a science fiction masterpiece that introduces us to a world where earthlings communicate with other civilizations. The main character, the ship's agent Smet Barba, is tasked with solving a complex international problem. To cope with this task, he must unravel intrigues and subterfuges at the diplomatic level, using all his diplomatic skills. The book "Diplomatic Immunity" is fascinating and at the same time helps the reader to think about issues of international relations and intergalactic diplomacy.