"Hiilivalkea" is a famous philosophical book by the Finnish writer Veikko Antero Koskenniemi. In this work, the author explores the nature of human existence, the interaction of the individual with the world around him, and the search for truth and the meaning of life. Koskenniemi reveals important questions about the role of man in modern society, his relationship with nature and himself. The book "Hiilivalkea" is a source of important reflections on the deep meanings of human existence and helps the reader to deepen his understanding of the world around him.