"Diderot and the Curé de Monchauve. Literary deception from Baron d'Holbac, 1754" - a book written by the famous French historian and literary critic Armand Gaste. In this study, the author examines a scandalous episode in the history of French literature in the 18th century, when Denis Diderot and other prominent personalities staged a literary trick that shocked society and sparked lively debates. The story of the romantic guide, the Curé de Monchauve, who turned out to be a fiction, became the object of Gaste's close attention. He reveals to the reader the finely woven manipulations and intrigues that went into creating this mythical figure. The author examines the influence of this episode on the literary and philosophical sphere of that time, highlighting the meaning and consequences of this mystification. "Diderot and the Curé de Monchauve. Literary Fraud by Baron d'Holbac, 1754" is an interesting study that provides a broad view of the literary practices and methods of the period, and also helps to better understand the socio-historical context.