“The Mystery of the Yellow Room” (1907) by Gaston Leroux is one of the first and most influential examples of the narrative technique of the "locked-room mystery," inaugurating a tradition later cultivated by creators such as John Dickson Carr and Agatha Christie.

At the heart of the work lies an apparently unsolvable puzzle: an attempted murder that takes place in a completely isolated space, internally locked and impenetrable, in the so-called "Yellow Room." Facing a mystery that defies logic is a young detective. His journey is not only toward solving the mystery but also toward the depths of the human soul, where truth coexists with illusion.

The text is a philosophical commentary on the limits of knowledge, on the illusion of apparent certainty — and on the irresistible human need to interpret the inexplicable. One of the foundations of literary mystery, timeless and deceptively topical.