The Book of Masks: Symbolist Portraits by Remy de Gourmont is a collection of philosophical essays where the author examines the nature of the poetic and artistic work of the Symbolists. In his reflections, he reveals the mystery and depth of the symbol, which have become the central elements of symbolism. Remy de Gourmont studies the work of great artists, revealing their ideas and creative approach to imagery. Each chapter of the book is a study of a particular artist or writer, helping the reader to better understand Symbolist art and literature. "The Book of Masks" is an important work for understanding symbolism and its influence on literature and art in general.