Publisher: Collins

First Printed: 1972

Cover Artist: Peter Archer
Frontispiece Artist: Roger Hall
Internal illustrator: Roger Hall

ISBN: 0-00-160508-9

Story version: N/A

First Printing Attributes:
-- Blue spine box with white text.
-- 12 titles listed on reverse cover.
-- Blue staining on page edges.
-- Gold price label: 45p.

Spine Art Description:
-- Biff falls into covered pit

Publisher: Armada Books
Cover Layout: Format A

First Printed: 1974 (August)

Cover Artist: Peter Archer

ISBN: 0-00-690933-7

Notes:
-- First printing back cover prices are as follows:
£0.25 (UK), $0.70 (NZ), $0.70 (AU), $0.95 (CAN).

Publisher: Armada Books
Cover Layout: Format C

First Printed: 1985

Cover Artist: Unknown

ISBN: 0-00-692527-8

Publisher: Armada Books
Cover Layout: Format D

First Printed: 1988

Cover Artist: Unknown

ISBN: 0-00-692527-8

Publisher: Armada Books
Cover Layout: Format E

First Printed: 1992

Cover Artist: Kenny McKendry

ISBN: 0-00-692527-8

Notes:
-- This was Kenny McKendry's second painting for the series. (Source: the interview with British artist David Browne, conducted by Bob Finnan in 2003).

Publisher: Armada Books

Cover Layout: Format E

First Printed: 1994

Featured stories:
#7 - The Mystery of the Melted Coins
#8 - The Mystery of the Spiral Bridge

Cover Artist: Kenny McKendry

ISBN: 0-00-694507-4

Notes:
-- First printing back cover prices are as follows:
£3.50 (UK).
-- Copyright Page