#5 The Mystery of the Vanishing Treasure

By Robert Arthur, 1966
1998 Latest Issue RH pb Bill Dodge art
RH hardbound, 1966.
Hitchcock Cover PB, 1980.
Keyhole Cover PB, 1985.
Random House Trade and GLB Hardbound Editions

First Printed: 1966
Cover Art: Harry Kane
Internal Illustrations: Harry Kane
ISBN's: Trade Ed. 0-394-81550-5; GLB 0-394-91550-X

Trade Edition First Printing Identifier: Lists to "The Secret of Skeleton Island" on the back cover.

Other Trade Edition First Printing Traits:
- Matte cover finish
- Blue graveyard endpapers 
- No ISBN

Notes:
1.) The back cover of the First Printing lists the first book in the series as "The Mystery of Terror Castle".
2.) A later printing, circa 1977, of the Trade Edition was manufactured with the glossy cover finish.  This printing lists to "The Mystery of the Headless Horse" on the back cover and has plain white endpapers.


- As shown to the left, later printings of the GLB Edition use Robert Adragna's cover art.

First Printed:  circa 1980
Cover Art: Robert Adragna
Internal Illustrations: Harry Kane
ISBN: 0-394-91550-X

Earliest Printing Identifier: Not known

Notes: The book pictured to the left lists on the inside to #30 and was probably manufactured in 1980 - same as #4 "The Mystery of the Green Ghost".  This book also contains an empty Random House Reading Program card pocket.
Random House First Paperback Edition
"Hitchcock Cover"

First Printed: 1980
Cover Art: Robert Adragna
Internal Illustrations: None
ISBN: 0-394-84452-1

First Printing Identifier: 1234567890 numberline on the copyright page.
Random House Revised Paperback Edition
"Keyhole Cover"

First Printed: 1985
Cover Art: Robert Adragna
Internal Illustrations: None
ISBN: 0-394-86405-0

First Printing Identifier: 1234567890 numberline on the copyright page.
Random House Latest Paperback Issue
"Dodge Cover"

First Printed: 1998
Cover Art: Bill Dodge
Internal Illustrations: None
ISBN: 0-394-86405-0

First Printing Identifier: 15 14 13 12 11 10 9 8 numberline on the copyright page.
Notes:
1.) Confusion Alert!  This title is a continuation of the Revised "Keyhole" Paperback Edition (which had 7 printings) but with new cover art.  The ISBN's are the same and the same printing plates were utilized.
2.) Confusion Alert!  Random House also issued a hardbound library edition with the Dodge Covers.  The ISBN found inside the hardbound edition is the same as that found in the paperback edition but the ISBN on the back cover is different: 0-613-unknown.
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