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| “Intelligent and deftly knit…There is danger enough and plenty of clues to pique the curiosity.” New York Times, 1941 | 
| Above from top left to bottom right: Dust and hardcover Stokes edition (1941); dust and 2 hardcovers Grosset & Dunlap (1941), unknown hardcover, dust and 2 hardcovers Collins (1945), Collins dustcover (1946) (Click on the covers to see the differences) * | 
| Pulp fiction writer Frank Belknap Long (1901-1944) has admitted writing at least two, unfortunately, without mentioning the titles. Mike Nevins, and in his wake half the internet, identified them as The Golden Eagle Mystery and The Green Turtle Mystery. We do know Samuel (Duff) McCoy (1882-1964) had a contract with Lee/Dannay for each of the first eight juveniles from The Black Dog Mystery until The Blue Herring Mystery but he didn't actually write the stories ... | 
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| Whilst 
												researching his new book on
												Ellery Queen, Jeffrey Marks found a 
												first edition of The Red 
												Chipmunk Mystery with the following 
												inscription "Rhinebeck, N.Y. 
												Aug. 31/48 For Karen Rose from 
												the only real ghost who had 
												anything to do with this book -
												Harold Montanye". 
												He looked into this and found 
												proof in correspondence between 
												McCoy and Montanye that all final six books before 
												1954 beginning 
												with The Green Turtle 
												Mystery were written by Montanye. Which throws a different light on the Frank Belknap Long admission to writing two or three in a letter to August Derleth. The identification of these two books was based on Nevins' identification. Long's two remaining volumes can only be the two remaining first volumes: The Black Dog Mystery and The Golden Eagle Mystery. There was even talk about the existence of a third volume called The Mystery of the Golden Butterfly which was apparently never published. (Without reference to EQ jr this "elusive" volume is mentioned as Long's on the rear panel of The Horror from the Hills, 1963 and on the rear flap of The Rim of the Unknown, 1972). (More on the authorship can be read here...) | 
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| Above: Illustrated with beautiful drawings by William Sanderson. | 
| The Black Dog Mystery Translations: | 
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