#22 The Mystery of the Dead Man's Riddle

By William Arden (Dennis Lynds), 1974
RH Hardbound 1974
Keyhole Cover pb 1984
Hitchcock Cover pb 1980
Back to Original Series page.

Random House Revised Paperback Edition
"Keyhole Cover"

First Printed: 1984
Cover Art: Robert Adragna
Internal Illustrations: None
ISBN: 0-394-86422-0

First Printing Identifier: 1234567890 numberline on the copyright page.
Random House First Paperback Edition
"Hitchcock Cover"

First Printed: 1980
Cover Art: Robert Adragna
Internal Illustrations: None
ISBN: 0-394-84451-3

First Printing Identifier: 1234567890 numberline on the copyright page.
Random House Trade and GLB Hardbound Editions

First Printed: 1974
Cover Art: Jack Hearne
Internal Illustrations: Jack Hearne
ISBN's: Trade Ed. 0-394-82927-1; GLB 0-394-92927-6

Trade & GLB Edition First Printing Identifier: 1234567890 numberline on the copyright page.

Other Trade Edition First Printing Traits:
- Matte cover finish
- Blue graveyard endpapers
- Back cover lists to "The Mystery of the Dead Man's Riddle"

Notes: As with "The Secret of the Haunted Mirror," only the First Printing of the Trade Edition has the blue graveyard endpapers, later printings have the plain white endpapers.


- As shown to the left, later printings of the GLB Edition used Robert Adragna's cover art.

First Printed: circa 1981
Cover Art: Robert Adragna
Internal Illustrations: Jack Hearne
ISBN: Same as above for GLB

First Printing Identifier: 890 numberline on the copyright page.  The first 7 printings of this title in GLB featured the Hearne cover art.