A tribute to Eduardo Polonio for his eightieth birthday and his nearly sixty years of compositional work. Eduardo Polonio is one of the pioneers of electroacoustic music in Spain.  The book, beautifully edited and profusely illustrated, shows in its 196 pages a panoramic view of his work, from the first instrumental works of the sixties, in conventional or non-conventional notation, through the chapter on composition processes, installations and multimedia actions, electroacoustic operas, discography, as well as his activities as a cultural manager. The text is bilingual (Spanish and English).  The introduction, in the form of biographies, has been written by prominent composers of the Spanish music scene, with texts by Miguel Álvarez Fernández, José Manuel Berenguer, José Iges, Adolfo Núñez and Edson Zampronha.  The book is accompanied by a CD that collects the most recent works (2015-2021) and that is, in a way, the continuation or update of his Edición Antológica (1969-2014) that contains a total of 48 electroacoustic works (about 10 hours long) covering a period of 45 years. This was a necessary edition, undoubtedly a reference to understand the work of this composer.