Ellery Queen (EQ) started work in 1929 and has little rest since then. Frederic Danny and Manfred Lee wrote more than thirty novels and scores of short stories featuring Ellery Queen until 1971. Then ghost writers took over the franchise. Then there have been radio, film and television adaptations. These are puzzle mysteries, locked rooms, disappearing items, and the like.
Confession: I have not read word one. I know Ellery Queen only from the air.
Radio:
The Adventures of Ellery Queen 1939-1949 on CBS, NBC, and then ABC voiced by Hugh Marlowe and others.
Here are some of the television series:
The Adventures of Ellery Queen (1950-1952) with Richard Hunt/Lee Bowman/Hugh Marlowe
The Further Adventures of Ellery Queen (1958-1959) with George Nader
Ellery Queen (1975-1976) with Jim Hutton
Films:
The Spanish Cape Mystery 1935 Donald Cook
The Mandarin Mystery 1936 with Eddie Quillan
Ellery Queen, Master Detective 1940 with Ralph Bellamy and Margaret Lindsay
Ellery Queen’s Penthouse Mystery 1941 with Ralph Bellamy and Margaret Lindsay
Ellery Queen and the Perfect Crime 1941 with Ralph Bellamy and Margaret Lindsay
Ellery Queen and the Murder Ring 1941 with Ralph Bellamy and Margaret Lindsay
A Close Call for Ellery Queen 1942 with William Gargan and Margaret Lindsay
Enemy Agents meet Ellery Queen 1942 William Gargan and Margaret Lindsay
A Desperate Chance for Ellery Queen1942 with William Gargan and Margaret Lindsay
Ellery Queen Don’t Look Behind You 1971 with Peter Lawford
Too Many Suspects 1975 with Jim Hutton
Nor should we overlook the Ellery Queen(‘) Mystery Magazine (1941+). It started with the possessive comma which it has since shed. It seems to be digital as well as print now, but it continues with an official web site where officiating occurs.
I rather liked best the sophomoric enthusiasm of Eddie Quillan. He projected energy, wit, and tenacity. The staging of Hutton’s television series was engaging and some episodes can be found on You Tube and Daily Motion.
Iowa’s Margaret Lindsay played Ellery Queen’s typist seven straight times and steals the show when the opportunity occurs. She is bright, energetic, and engaging unlike the catatonic Ralph Bellamy and the comatose William Gargan, but in the conventions of the time, often she is confined largely to the screaming and fainting duties.
Nota Bene, Ralph Bellamy is credited with keeping the ravening beast HUAC off Broadway later during his tenure as President of the actors guild. The easy success of dividing and pillorying Hollywood for headlines tempted the cannibals of HUAC turn east for more flesh to eat but Bellamy secured a nearly unanimous front of Broadway actors, producers, directors, and investors to refuse to cooperate. That must have taken some doing among all those enemies, rivalries, and egos. Read the details in his biography on Wikipedia.