#23 The Mystery of the Invisible Dog

By M.V. (Mary Virginia) Carey, 1975

Back to the Original Series page.

Random House Revised Paperback Edition 

"Keyhole Cover"

First Printed: 1984 

Cover Art: Robert Adragna 

Internal Illustrations: None

ISBN: 0-394-86423-9

First Printing Identifier: 1234567890 numberline on the copyright page.

Random House First Paperback Edition 

"Hitchcock Cover"

 

First Printed: 1981 

Cover Art: Robert Adragna 

Internal Illustrations: None

ISBN: 0-394-84492-0

First Printing Identifier: 1234567890 numberline on the copyright page.

Notes: As with all of The Three Investigators paperback titles printed in 1981, this book can be found with the Mystery Quiz/Bookmark page attached inside the front or back cover.

Random House Trade and GLB Hardbound Editions 

First Printed: 1975 

Cover Art: Jack Hearne 

Internal Illustrations: Jack Hearne

ISBN's: Trade Ed. 0-394-83105-5; GLB 0-394-93105-X

Trade & GLB Edition First Printing Identifier: 1234567890 numberline on the copyright page.

Other Trade Edition First Printing Traits: 

- Matte cover finish 

- Plain white endpapers (see exception below) 

- Back cover lists to "The Mystery of the Invisible Dog"

Notes: 

1.) This was the last title to be issued with the matte covers.

2.) Plain white endpapers were standard starting with this book.  However, there are a few known examples of this title that have the blue graveyard endpapers.  This is apparently the result of the manufacturer using up leftover materials. 

 

- As shown to the left, later printings of the GLB Edition used Robert Adragna's cover art.  These are quite difficult to find.

 

First Printed: circa 1981 

Cover Art: Robert Adragna 

Internal Illustrations: Jack Hearne

ISBN: Same as above for GLB

First Printing Identifier: 7890 numberline on the copyright page. (The first 6 printings featured the Hearne cover art.)

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