The book by Perepelkin consists of two volumes, which are separated with seventeen years. The first volume was published in 1967, the second – in 1984, between them his book ‘Kiya and Smenhkare. Towards the End of the Sun-Worshiping Coup in Egypt’ was published in 1979. These three volumes form, in fact, a single cycle dedicated to the reform of Akhenaten and the sun-worshiping cult. The task set by the author is to build a purely source study. “With all the abundance of monuments left by the time of Amenhotep IV, very few of them, apart from economic notes, are marked with exact years of his reign”, the author writes; but since the coup carried out by this Pharaoh affected all spheres of Egyptian life, and was divided into a number of important, rapidly replacing each other, epochs, the chronology of the preserved sources acquires the utmost importance. Consequently, before any attempt to write a history of the coup, the question of the relative and absolute chronology of the sources should be resolved, and this will inevitably be preceded by the solution of the problem of the criteria for constructing such a chronology. Thus, P.'s work begins with the establishment of signs that allow him to date evidences. Such signs are changes in titles, vocabulary, and spelling of names. The results of such work are presented in the book about Kiya, the second wife of Akhenaten, and in the second volume of ‘The Coup of Amenhotep IV’, which summarizes the author's observations and offers his own reconstruction of the reforms and their consequences.