"Selected letters and responses of the victims of Les mystifications de Caillot-Duval" is a unique collection that reveals the vivid personality and endless colorful world of the French con artist and philosopher Caillot-Duval. The authors of Boisgelin de Kerdu and Fortia de Piles help us to better understand this unusual figure, who is always able to surprise and entertain with his inventive jokes and intrigues. In every letter, every answer, we find a new case of his "mystifications", in which he found an expressive expression of his philosophy and wit. Thanks to this book, we find ourselves in the everyday life of this sophisticated trickster and thinker who knows how to surprise and make us laugh, leaving behind us only to succumb to his fraud with smiles on our lips."