The monograph consists of a set of correspondence with Miloš Šafránek, a Czech diplomat, music journalist, Martinů's biographer, and a promoter of his work. The volume contains the diplomatic transcriptions of 168 letters, six postcard, five postal cards, one telegram, and one lettercard from the period of 1928-1959. The vast majority of the correspondence is unilateral, addressed to Šafránek, only two of the items were sent by Šafránek. The method of diplomatic transcription, chosen by the authors of the edition, respects the peculiarities of Martinů's linguistic expression. Comprehensive annotations provide historical context and illustrate the political circumstances of the most tumultuous years of the twentieth century, but they also comment on the genesis of compositions.