Bigsby, C. W. E. Joe Orton, Methuen, 1982.

A sophisticated scholarly analysis of Orton's work that places Entertaining Mr. Sloane in the context of postmodernist thought. Difficult reading but essential for the advanced study of Orton's drama.

Charney, Maunce. Joe Orton, Grove Press, 1984.

In a chapter on Entertaining Mr. Sloane, Charney focuses on the characters' use of language as a way of finding their true selves.

Dean, Joan F "Joe Orton and the Redefinition of Farce" in Theatre Journal, December, 1982, pp. 481-92.

An article that examines the ways in winch Orton altered the practice of stage farce to take it beyond the conventional boundaries of light entertainment.

Lahr, John. Prick up Your Ears: The Biography of Joe Orton, Knopf, 1978

The definitive biography of Joe Orton, written by the son of the great concoctor, Bert Lahr (he played the Cowardly Lion in The Wizard of Oz) Very readable...