#3 The Mystery of the Whispering Mummy

By Robert Arthur, 1965
Random House Trade and GLB Hardbound Editions

First Printed: 1965 
Cover Art: Harry Kane 
Internal Illustrations: Harry Kane 
ISBN's: Trade Ed. 0-394-81220-4; GLB 0-394-91220-9

Trade Edition First Printing Identifier: No title list on the back cover.

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

Notes: 
1.) It's much more difficult to acquire titles #3 or #4 with no list on the back
     cover than it is for titles #1 or #2.  
2.) Copies of #3 and #4 listing to #4 on the back cover are later printings,
     NOT First Printings as often implied by on-line dealers.
Random House First Paperback Edition

"Marchesi Cover"

First Printed: 1978 
Cover Art: Stephen Marchesi 
Internal Illustrations: Harry Kane
ISBN: 0-394-83768-1 

First Printing Identifier: 1234567890 number line on the copyright page. 

Notes: There were 8 Printings of this title with the Marchesi cover art in this edition. With the 9th Printing, below, the new Adragna cover art was used.




"Hitchcock Cover"

First Printed: circa 1982 (9th Printing)
Cover Art: Robert Adragna 
Internal Illustrations: Harry Kane 
ISBN: 0-394-83768-1 (Same as Marchesi Cover)

First Printing Identifier: 90 number line on the copyright page.

Notes: 9th printings list to "Wandering Cave Man" and 10th printings list to "Missing Mermaid". Copies which list to "Two-Toed Pigeon" do not have a number line on the copyright page and these are assumed to be 11th printings.
Scholastic Book Services Paperback Edition

First Printed: January 1979 
Cover Art: Harry Kane 
Internal Illustrations: None 
ID#: TK 4510

First Printing Identifier: 12 11 10 9 8 7 6 5 4 3 2 1 number line on the copyright page.
Random House Revised Paperback Edition

"Keyhole Cover"

First Printed: 1985 
Cover Art: Robert Adragna 
Internal Illustrations: None 
ISBN: 0-394-86403-4

First Printing Identifier: 1234567890 number line on the copyright page.
Random House "Dodge" Paperback Edition

"Dodge Cover"

First Printed: 1998 
Cover Art: Bill Dodge 
Internal Illustrations: None 
ISBN: 0-394-86403-4

First Printing Identifier: 20 19 18 17 16 15 14 13 12 11 number line on the copyright page. 
Weekly Reader Books Hardbound Edition

"Just For Boys"

First Printed: circa 1989 
Cover Art: Robert Adragna 
Internal Illustrations: None 
ISBN: Refers to the ISBN for the Random House Revised Paperback Edition on the copyright page: 0-394-86403

First Printing Identifier: 1234567890 number line on the copyright page. 

Notes: 
1.) While the text of this Edition is the same as the Random House Revised
     Paperback Edition, new printing plates were used (new typeface) and
     Hector Sebastian's introduction was not included in this book.
2.) Interestingly, the words "The Three Investigators" do not appear on the
     spine or front cover of this Edition!
Notes: 
1.) Confusion Alert! This title is a continuation of the Revised "Keyhole"
     Paperback Edition but with new cover art and a new set of printings. The
     ISBNs are the same and, except for the introduction chapter, 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: 0-613-08416-0
Back to the Original Series page.
Hollow Tree Press Paperback Edition (Print on Demand)

First Printed: June 10, 2024, Amazon; July 20, 2024, Barnes & Noble 
Jacket Design: Elizabeth Arthur
Internal Illustrations: None
ISBN: 979-8-322-80709-4 Amazon; 979-8-331-43378-9 B&N

First Printing Identifier: None. However, the books printed by Amazon will have the city and the date that the book was manufactured printed on one of the last blank pages of the book.

Notes: 
1.) This edition utilizes the 1985 Revised Text.
2.) This book features a 2-page "About the Author" section and 9 pages of Endnotes covering Archaeologists, Mummies, and Ventriloquism, penned by
Elizabeth Arthur and Steven Bauer.