Publisher: Random House
First Printed: 1968
Cover Art by Harry Kane
Internal Illustrations by Harry Kane

Trade Edition First Printing Identification:
-- Back cover list to The Mystery of the Moaning Cave

Additional Trade Edition First Printing Characteristics:
-- Matte cover finish
-- Blue graveyard/spiderweb endpapers
-- Rear inner list to The Mystery of the Moaning Cave
-- No ISBN on the back cover
-- Copyright Page details: click here

Notes:
-- At least two printings of the Trade Edition can be found with the semi-gloss cover finish. They either list to The Mystery of the Nervous Lion or The Mystery of Monster Mountain on the back cover.
-- The title list on the back cover of the Trade Edition is usually printed in white. A printing can be found, however, that lists to The Mystery of the Nervous Lion with the text printed in yellow. The covers on this printing are matte, not semi-gloss as noted above. Click here for an example.

Publisher: Scholastic Book Services
First Printed: October 1978
Cover Art by Harry Kane
Internal Illustrations: None

First Printing Identification: 12 11 10 9 8 7 6 5 4 3 2 1 numberline on the copyright page.

Notes:
-- The cover art for Scholastic's edition was again by Harry Kane, but was an updated version of his original work for Random House. Besides the different background color, there are subtle differences which become apparent when the two are compared side by side. This is also the only Harry Kane cover that bears his signature; it can be found in the lower left corner.

Publisher: Random House
Common Name: Marchesi Cover
First Printed: 1978
Cover Art by Stephen Marchesi
Internal Illustrations by Harry Kane

First Printing Identification: 1234567890 numberline on the copyright page.

Notes:
-- The cover art for this edition was changed in its Ninth Printing (1983) to the Robert Adragna work shown below. This change in cover art did not require an edition change.

Common Name: Hitchcock Cover
First Printed: 1983, Ninth Printing
Cover Art by Robert Adragna
Internal Illustrations by Harry Kane

First Printing Identification: 90 numberline on the copyright page.

Publisher: Random House
Common Name: Keyhole Cover
First Printed: 1985
Cover Art by Robert Adragna
Internal Illustrations: None

First Printing Identification: 1234567890 numberline on the copyright page.

Publisher: Alfred A. Knopf, Inc.
Common Name: Bullseye Edition
First Printed: June 1991
Cover Art by Dominick Finelle
Internal Illustrations: None

First Printing Identification: 10 9 8 7 6 5 4 3 2 1 numberline on the copyright page.

Notes:
-- The text of this edition is identical to the Revised Edition's text.
-- Knopf is a division of Random House.

Publisher: Random House
Common Name: Dodge Issue
First Printed: 1999
Cover Art by Bill Dodge
Internal Illustrations: None

First Printing Identification: 20 19 18 17 16 15 14 13 12 11 numberline on the copyright page.

Notes:
-- This version is not a new edition, but a reissue (with a new set of printings) of the Bullseye Edition with different cover art. Both share the same ISBN and printing plates (typeface). Technically, this issue should be included with the Bullseye Edition, but was given a separate section because it was part of a recent Random House release of the first eleven books in the series with renewed copyrights.