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Gaston Leroux
Gaston Louis Alfred Leroux was born in Paris and worked there as an author and journalist (Wikipedia). His most famous work is The Phantom of the Opera as it has been made into films and a musical.
Le fantôme de l'opéra
A young singer in the Paris Opera House finds her career blossoming under the tutelage of a mysterious voice. But this unseen mentor, a disfigured musical genius living within the opera's walls, harbors a dangerous obsession. As her fame grows, so does the conflict between her devoted childhood friend and her possessive, hidden admirer.
While the novel is a work of fiction, Gaston Leroux incorporated several real-life events and legends associated with the Palais Garnier in Paris, such as the 1896 chandelier counterweight accident and the existence of an underground reservoir beneath the building.
This work is a standalone novel and does not belong to a series.