Publisher: Random House
First Printed: 1976
Cover Art by Jack Hearne
Internal Illustrations by Jack Hearne

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

Additional Trade Edition First Printing Characteristics:
-- Glossy cover finish
-- Blank white endpapers
-- Back cover list to The Mystery of the Dancing Devil
-- No inner list

Notes:
-- This was the first new Trade title to use the glossy cover finish.

Publisher: Random House
Common Name: Hitchcock Cover
First Printed: 1980
Cover Art by Robert Adragna
Internal Illustrations: None

First Printing Identification: 1234567890 numberline on the copyright page.

Publisher: Random House
Common Name: Keyhole Cover
First Printed: 1984
Cover Art by Robert Adragna
Internal Illustrations: None

First Printing Identification: no numberline on the copyright page, but a rear inner list to The Mystery of the Two-Toed Pigeon and The Three Investigators' Book of Mystery Puzzles.