Ambrotx and Limping Dick Mystery and Detective by Oliver Fleming

 Ambrotox and Limping Dick by Oliver Fleming

Oliver Fleming was a pseudonym used by the British authors Ronald MacDonald (1860-1933) and his son Philip MacDonald (1900-1980). Works published under this name include Ambrotox and Limping Dick (1920) and The Spandau Quid (1923). Philip MacDonald also wrote as Anthony Lawless, Martin Porlock, W. J. Stuart and Warren Stuart. His detective novels, particularly those featuring his series detective Anthony Gethryn, are primarily whodunnits with the occasional locked room mystery. His novel X. V. Rex (1933), aka The Mystery of the Dead Police, is an early example of what has become known as a serial killer novel. In later years Philip MacDonald wrote television scripts for Alfred Hitchcock Presents (Malice Domestic, 1957) and Perry Mason (The Case of the Terrified Typist, 1958).

 Ambrose Lavendale, Diplomat by E. Phillips Oppenheim

Mr Ambrose Lavendale. a young English-American diplomat, leaves the Embassy service to work as a secret agent in London during World War One. He meets Mlle. Suzanne de Frayne, who is similarly employed by the French, while he is shadowing a scientist who has developed a formula for a lethal gas explosive. In a series of connected stories, the pair uncover German spies, foil plots to divert munitions from the Allies, steal secret weapons, and fall in love.

The Grand Babylon Hotel by Arnold Bennett

 The Grand Babylon Hotel by Arnold Bennett

The Grand Babylon Hotel is a novel by Arnold Bennett, published in January 1902, about the mysterious disappearance of a German prince. It originally appeared as a serial in the Golden Penny. The titular Grand Babylon was modelled on the Savoy Hotel which Bennett had much later also used as a model for his 1930 novel Imperial Palace.

In Bennett's journal entry on 18 January 1901, he also notes that said his serial was being advertised was the "best thing of this sort" they'd seen since The Mystery of a Hansom Cab by Fergus Hume. 

 The Great Diamond Syndicate by Nicholas Carter

Thrilling detective and mystery in this old pulp tale by Nicholas Carter.