The books listed below are unlikely to improve anybody's mind, but they may increase the reader's general respect for human ingenuity. It is the function of detective-novels to entertain the reader by outwitting him, and I have chosen a few which seem to me the most likely to accomplish that result.
Wilkie Collins: The Moonstone. 1868; numerous recent reprints by Harper, Nelson, Oxford Press, etc.
A. Conan Doyle: The Complete Sherlock Holmes. Two volumes. Doran. 1930.
E. C. Bentley: Trent's Last Case. Knopf. 1930.
Agatha Christie: The Murder ofRoger Ackroyd. Dodd, Mead. 1926. Reprinted by Grosset and Dunlap. Eden Phillpotts: A Voice from the
Dark. Macmillan. 1925. Kay Strahan: The Desert Moon Mystery. Doran. 1928. Grosset and Dunlap.
S. S. Van Dine: The Greene MurderCase. Scribners. 1928. Grosset and
Dunlap. Robert Hichens: The Paradine Case. Doran. 1933.
W. H. Wright, editor: The GreatDetective Stories. Scribners. 1927. Reprinted by Blue Ribbon Books.