The name of A. S. Popov (1859–1905) is inscribed in golden letters in the history of Russian and world science. The result of his many years of experience in the field of radio communications was the creation in 1895 of the world's first radio receiver. Popov's priority in this area is disputed in the West, where other scientists are considered the creators of radio - G. Marconi, O. Lodge, N. Tesla. The most complete biography of Popov to date, written by the famous historian of science M.I. Radovsky, helps to clarify the reasons for this, restore justice to the Russian inventor, and show the paths that led him to the epoch-making discovery. This edition of the book, published on the 150th anniversary of the scientist’s birth, has been updated and supplemented with new materials. Published with the financial support of the Federal Agency for Press and Mass Communications within the framework of the Federal Target Program “CULTURE OF RUSSIA”.