The book includes the correspondence of the family of M.I. Tsvetaeva and her close circle: Sergey Efron, Sophia Parnok, Max. Voloshin. 309 letters are grouped into 5 sections on chronology and event outline: 1910-1914, 1915-1917, 1918-1922, 1923-1939, 1939-1941. A significant part of the letters is published for the first time, they will add new features to the portrait of one of the great poets of the 20th century. The book contains unique photographic materials from public and private collections.