Publisher: Collins

First Printed: 1972

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

ISBN: 0-00-160519-4

Story version: Revised text

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

Spine Art Description:
-- Boys on horse chased by pack of dogs.

Publisher: Armada Books
Cover Layout: Format A

First Printed: 1975 (March)

Cover Artist: Peter Archer

ISBN: 0-00-691039-4

Notes:
-- First printing back cover prices are as follows:
£0.35 (UK), $0.90 (NZ), $0.90 (AU), $1.25 (CAN).

Publisher: Armada Books
Cover Layout: Format B

First Printed: 1983

Cover Artist: Unknown

ISBN: 0-00-692235-X

Publisher: Armada Books
Cover Layout: Format C

First Printed: 1984

Cover Artist: Unknown

ISBN: 0-00-692235-X

Publisher: Armada Books
Cover Layout: Format E

First Printed: 1992

Cover Artist: David Browne

ISBN: 0-00-692235-X

Notes:
-- This was one of David Browne's very last cover illustrations for the series and dates from late 1992. (Source: the interview with British artist David Browne, conducted by Bob Finnan in 2003).

Publisher: Armada Books

Cover Layout: Format D

First Printed: 1990

Featured stories:
#17 - The Shore Road Mystery
#18 - The Great Airport Mystery
#19 - The Sign of the Crooked Arrow

Cover Artist: Unknown

ISBN: 0-00-694012-9

Notes:
-- First printing back cover prices are as follows:
£4.99 (UK), $14.95 (NZ).
-- The cover artwork for this paperback is unique to this edition.

Publisher: Armada Books

Cover Layout: Format E

First Printed: 1995

Featured stories:
#19 - The Sign of the Crooked Arrow
#20 - The Clue In The Embers

Cover Artist: David Browne

ISBN: 0-00-694510-4

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

Publisher: Mulberry / Dragon Books

First Printed: 1991 (Mulberry) 1994 (Dragon)

Featured stories:
#17 - The Shore Road Mystery
#18 - The Great Airport Mystery
#19 - The Sign of the Crooked Arrow

Cover Artist: Brian Kotzky

ISBN: 0-00-694228-8 (Dragon)

Notes:
-- Two virtually identical versions of this hardback edition exist: the first credited to Mulberry (copyright page), the other credited to Dragon (copyright page).
-- The Mulberry copyright page gives the publication date as 1991, while the Amazon listing for the Dragon reprint states that it was issued in 1994.

Publisher: Diamond Books

First Printed: 1994

Featured stories:
#17 - The Shore Road Mystery
#18 - The Great Airport Mystery
#19 - The Sign Of The Crooked Arrow

Cover Artist: David Browne

ISBN: 0-261-66218-X

Notes:
-- This particular selection of titles was first issued in an omnibus edition by Armada in 1990.