"The Treasure of the Old Knight" is an exciting historical novel from the French writing duo Erkman-Chatrian. The book tells about the adventures of a young knight who goes in search of a mysterious treasure to save his hometown from corrupt criminals. The authors skillfully weave colorful images of the medieval world, intrigue and danger into the plot, which makes the book exciting for any lover of the adventure genre. "The Treasure of the Old Knight" is an exciting journey into the world of secrets and real heroes.