(See
Ellery Queen.) This novel was the fifth in a long series of novels featuring Ellery Queen, the first nine containing a nationality in the title. The introduction to this novel contained a detail which is now not considered part of the Ellery Queen
canon. The introduction is written as by the anonymous "J.J. McC.", a friend of the Queens. Other details of the lives of the fictional Queen family contained in earlier introductions have now disappeared and are never mentioned again; the introductory device of "J.J. McC." lasts only through the tenth novel,
Halfway House, then vanishes (though J.J. appears onstage in
Face to Face in 1967). This novel is the first to feature Ellery Queen investigating a murder alone, outside
New York City, and without the assistance of his father, Inspector Richard Queen of the Homicide Squad. The novel, and the other "nationality" mysteries, had the unusual feature of a "Challenge to the Reader" just before the ending is revealed—the novel breaks the
fourth wall and speaks directly to the reader. "It has been my custom to challenge the reader's wits at such point in my novels at which the reader is in possession of all facts necessary to a correct solution of the crime or crimes.
The Egyptian Cross Mystery is no exception: by the exercise of strict logic and deductions from given data, you should now be able, not merely to guess, but to prove the identity of the culprit." == External links ==