The author of the book is Firuz Kazem-Zade, Doctor of Historical Sciences, Professor at Yale University (USA), talks about the history of diplomatic relations between Russia and England in Persia from the second half of the 19th to the beginning of the 20th century. At that time, the political confrontation between the two powers in this region escalated and it was diplomacy that made it possible to avoid an international conflict, largely influencing the course of historical events.