Gaston Leroux (1868–1927) is a classic author whose works are in the public domain.

When a young woman is violently attacked in a locked room and vanishes without a trace, journalist and amateur detective must navigate a labyrinth of secrets, hidden passages, and psychological deception in this ingenious locked-room mystery. Leroux combines the architectural puzzles of crime fiction with the psychological intensity of character study, creating a whodunit that rewards rereading.
