The book "PSS. Volume 77. Letters, 1907" is a collection of letters written in 1907 by the outstanding Ukrainian writer Lesya Ukrainka. This book contains letters to various people - from friends to prominent figures of that time. The reader will have the opportunity to delve into the unique atmosphere of life in the Ukrainian cultural world of the beginning of the 20th century through the prism of Lesya Ukrainka's personal records. This book reflects not only the writer's literary heritage, but also her inner experiences, relationships with colleagues, and thoughts about social and political events of her time. The letters of Lesya Ukrainka are a kind of window into the world of the great poetess, which allows us to better understand her creativity and personality. "PSS. Volume 77. Letters, 1907" is not only a valuable document about the life and work of Lesya Ukrainka, but also a unique chance to immerse yourself in the history of Ukrainian literature and culture at the beginning of the last century.