1.) Lists to "The Mystery of the Coughing Dragon" on the back cover.
2.)No ISBN.
Other Trade Edition First Printing Traits:
- Matte cover finish
- Blue graveyard endpapers
Notes: Sometimes "semi-glossy" hardbound copies of this title show up, they list to #16 on the back cover and have the story summary on the copy- right page. "Matte" copies listing to #16 can be found with and without the story summary on the copyright page.
Random House First Paperback Edition
"Hitchcock Cover"
First Printed: 1981
Cover Art: Robert Adragna
Internal Illustrations: None
ISBN: 0-394-84666-4
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.
Scholastic Inc., Paperback Edition
First Printed: November 1983
Cover Art: Robert Adragna
Internal Illustrations: None
ISBN: 0-590-32833-6
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: 1984
Cover Art: Robert Adragna
Internal Illustrations: None
ISBN: 0-394-86414-X
First Printing Identifier: 1234567890 numberline on the copyright page.