This volume includes the main philosophical work of A.F. Losev "Dialectics of myth" and "Supplement" to it. This edition is the most complete, it includes new, previously unpublished materials, both received from the FSB and recently found in the author's archive. In addition to additions to the text, among them are versions of the last chapter of "Dialectics of Myth," as well as a statement by the author to Glavlit regarding the inserts into the text that caused his arrest (in our publication, these inserts are highlighted in the text with special typographic signs). All materials were re-verified, and the main part - according to the manuscript that was at the disposal of the compilers. The publication is provided with detailed notes and pointers.