Read "Le Fantôme de l'Opéra" by Leroux, Gaston for free. A classic public domain work covering composers -- fiction, french fiction -- 20th century, horror tales. Available in full text from Project Gutenberg.
Composers -- Fiction
French fiction -- 20th century
Horror tales
Musical fiction
Opera -- Fiction
Paris (France) -- Fiction
Phantom of the Opera (Fictitious character) -- Fiction
This book is in the public domain. Free to read and download from Project Gutenberg.