#12 The Mystery of the Laughing Shadow

By William Arden (Dennis Lynds), 1969
1978 Marchesi Cover pb
1969 Hardbound.  Harry Kane cover art
Hitchcock Cover. 1st ed. PB circa 1982
Weekly Reader Hardbound circa 1990
Keyhole Cover 2nd PB edition 1985
Random House Trade and GLB Hardcover Editions

First Printed: 1969
Cover Art: Harry Kane
Internal Illustrations: Harry Kane
ISBN's: Trade Ed. 0-394-81492-4; GLB 0-394-91492-9

Trade Edition First Printing Identifier: Lists to "The Mystery of the Laughing Shadow" on the back cover.

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

Notes: Sometimes "semi-glossy" cover hardbound copies of this title show up, they usually list to #16 or #20 on the back cover.
Random House First Paperback Edition
"Marchesi Cover"

First Printed: 1978
Cover Art: Stephen Marchesi
Internal Illustrations: Harry Kane
ISBN: 0-394-83775-4

First Printing Identifier: 1234567890 numberline on the copyright page.

Notes: There were 8 Printings of this title with the Marchesi Cover art in this edition printed between 1978 and 1981/82.  With the 9th Printing, below, the new Adragna cover art was used.



"Hitchcock Cover" Paperback

First Printed: circa 1982 (9th Printing)
Cover Art: Robert Adragna
Internal Illustrations: Harry Kane
ISBN: Same as Marchesi Cover above

Earliest Printing Identifier: 90 numberline on the copyright page.
Scholastic Book Services Paperback Edition

First Printed: September 1979
Cover Art: Charles Liese
Internal Illustrations: None
ISBN: 0-590-30053-9

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

First Printed: 1985
Cover Art: Robert Adragna
Internal Illustrations: None
ISBN: 0-394-86412-3

First Printing Identifier: 1234567890 numberline on the copyright page.
Weekly Reader Children's Book Clubs Hardbound Edition

First Printed: circa 1989
Cover Art: Robert Adragna
Internal Illustrations: None
ISBN: Same as the Keyhole Paperback above.

First Printing Identifier: None

Notes: One of two Three Investigators books issued by Weekly Reader, the other being "The Mystery of the Whispering Mummy." 
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