Books in Detective Fiction (sorted alphabetically)
- Man in the Brown Suit Agatha Christie
- Martin Hewitt, Investigator Arthur Morrison
- Max Carrados Ernest Bramah
- Memoirs of Sherlock Holmes Arthur Conan Doyle
- Memoirs of Sherlock Holmes Arthur Conan Doyle
- Middle of Things J. S. Fletcher
- Middle Temple Murder J. S. Fletcher
- Middle Temple Murder J. S. Fletcher
- Monsieur Lecoq, v. 1 Emile Gaboriau
- Monsieur Lecoq — Volume 1 (French) Emile Gaboriau
- Monsieur Lecoq — Volume2 (French) Emile Gaboriau
- Moon Rock Arthur J. Rees
- Moonstone Wilkie Collins
- Murder on the Links Agatha Christie
- mystère de la chambre jaune (French) Gaston Leroux
- Mysterious Affair at Styles Agatha Christie
- Mystery of 31 New Inn R. Austin Freeman
- Mystery of Orcival Emile Gaboriau
- Mystery of the Boule Cabinet: A Detective Story Burton Egbert Stevenson
- Mystery of the Hasty Arrow Anna Katharine Green
- Mystery of the Yellow Room Gaston Leroux
- Old Man in the Corner Baroness Emmuska Orczy Orczy
- Orange-Yellow Diamond J. S. Fletcher
- Other People's Money Emile Gaboriau
- Paradise Mystery J. S. Fletcher