Unless the Threat of Death is Behind Them - Hard-Boiled Fiction and Film Noir

Early in the twentieth century a new character type emerged in the crime novels of American writers such as Dashiell Hammett and Raymond Chandler: the "hard-boiled" detective, most famously exemplified by Sam Spade in The Maltese Falcon. Unlike the analytical detectives of nineteenth-century fiction, such as Edgar Allan Poe's Dupin, the new detectives encountered cases not as intricate logical puzzles but as stark challenges to manhood.

The Murders in the Run Morgue and The Purloined Letter. (level 6)

Two cases of detection for Monsieur Auguste C. Dupin, Poe's great detective. Who could have committed the atrocioius murders in the Rue Morgue and so how did the murderer get in, or out? Will Dupin find the purloined letter and save the royal personage? Where is the minister hiding it?

The League of Extraordinary Gentlemen Books
Volume 1
Being a Sampler of the Earlier Exploits of a Certain Gathering
of Incredible Individuals, to whit :
Miss Mina Harker, Allan Quatermain, Captain Nemo, Henry Jekyll
and Hawley Griffin, their unconscionable adversaries Professory Moriarty
and Dr. Fu-Manchu and their esteemed allies, C. Auguste Dupin,
Mycroft Holmes, Selwyn Cavor, Randolph Carter, John Carter, Lady Ragnall
and an unidentified Time Traveller.
http://en.wikipedia.org/wiki/The_League_of_Extraordinary_Gentlemen