Puzzles of the Black Widowers
Isaac Asimov
Black Widowers (5)
The Second Horseman Out of Eden
George C. Chesbro
Mongo (7)
The Servants of Twilight
Dean R. Koontz
The Best Mysteries of Isaac Asimov
Banquets of the Black Widowers
Black Widowers (4)
Casebook of the Black Widowers
Black Widowers (3)
An Affair of Sorcerers
Mongo (3)
It Looks Alive to Me!
Thomas Baum
Mystery of the Sassafras Chair
Alexander Key
The Yeggman
Arthur B. Reeve
Craig Kennedy (1)
Prince Zaleski
M. P. Shiel