The book "Esperanta sintakso Laų vorok de S-ro D-ro Zamenhof kaj alaj autoroj" by the author Paul Fruictier is an important study in the field of Esperanto language syntax. The author analyzes and elaborates the theory of syntax, which was developed by S. D. Zamenhof and other famous authors. The book examines in detail the structure of sentences, their relationship and ways of expressing language constructions in Esperanto. The author uses examples from original texts and documents, which helps readers better understand Esperanto syntax. This book will be a useful addition to anyone learning Esperanto and wishing to gain a deeper understanding of its syntactic features.