The Hal Keen Mystery Stories: The Hermit of Gordon's Creek; Kidnapped in the Jungle; The Copperhead Trail Mystery; The Smuggler's Secret; The Mysterious Arab; The Lonesome Swamp Mystery; The Clue at Skeleton Rocks; The Doom of Stark House; The Lost Mine of the Amazon; The Mystery at Dark Star Ranch [Ten Volumes, Complete]
New York: Grosset & Dunlap, [ca. 1931-1934]. Mixed printings. Ten octavo volumes. Four plates, including frontispieces, to each volume, all by Salg. Illustrated dust jackets to each volume, excepting The Clue at Skeleton Rocks and The Mystery at Dark Star Ranch. Kidnapped in the Jungle and Copperhead Trail Mystery in..... More