"Purgatory" is an adventure novel by the French writer Thierry Sandro. This book tells the story of a group of friends who decide to leave their ordinary lives and embark on a risky journey through a mysterious and dangerous place known as Purgatory. During their journey, the main characters face inevitable trials, mysteries and skirmishes that require them to show courage, courage and ingenuity. Will they be able to overcome all obstacles and reach the final goal? "Purgatory" is an exciting story about friendship, faith and inner strength that helps overcome any obstacles on the way to achieving goals.