Un bon petit diable is a novel written by the French author Comtesse de Ségur. It tells the story of a mischievous young boy named Charles, who is sent to live with his strict aunt after the death of his parents. Despite his aunt's efforts to discipline him, Charles continues to cause trouble and play pranks on those around him.
One day, Charles discovers a hidden room in his aunt's house that contains a treasure map. Determined to find the treasure, he enlists the help of his friends and embarks on an adventure that leads them to a mysterious castle.
As Charles and his friends search for the treasure, they encounter various obstacles and learn valuable lessons about friendship, loyalty, and the importance of honesty. Will they be able to find the treasure and overcome the challenges that stand in their way?