Publisher: Collins

First Printed: 1979 (13th September)

Cover Artist: Peter Archer
Frontispiece Artist: Peter Archer
Internal illustrator: None

ISBN: 0-00-160546-1

Story version: N/A

First Printing Attributes:
-- Blue spine box with white text.
-- 48 titles listed on reverse cover.
-- Page edges not stained.
-- Printed on white paper.
-- Gold price label: £1.25.

Spine Art Description:
-- Boys find Sam unconscious.

Publisher: Collins

First Printed: ~1985

Cover Artist: Peter Archer
Frontispiece Artist: Peter Archer
Internal illustrator: None

ISBN: 0-00-160546-1

Story version: N/A

First Printing Attributes:
-- Retail price: £1.50
-- 12 titles listed on reverse cover.
-- Printed on white paper.

Spine Art Description:
-- N/A.

Publisher: Armada Books
Cover Layout: Format D

First Printed: 1988

Cover Artist: Kenny McKendry

ISBN: 0-00-692829-3

Notes:
-- First printing back cover prices are as follows:
£1.95 (UK), $7.50 inc. GST (NZ), $5.95 (AU).
-- Kenny McKendry and his flat-mate Justin posed as the Hardy Boys for this particular cover illustration, much to the amusement of McKendry's fiancée. David Browne took the photographs on which the artwork was based. (Source: the interview with British artist David Browne, conducted by Bob Finnan in 2003).

Publisher: Diamond Books

First Printed: 1994

Featured stories:
#44 - The Masked Monkey
#45 - The Shattered Helmet
#46 - The Clue of the Hissing Serpent

Cover Artist: Kenny McKendry

ISBN: 0-261-66223-6