The Hardy Boys: The Disappearing Floor
New York: Grosset & Dunlap, 1940. Hardcover. 7 5/8" X 5 3/8". vi, 218pp. Later printing, circa 1944, with front flap listing up to The Melted Coins, number 23 in the Hardy Boys series, rear flap listing to 7 in the Lone Ranger Stories, and rear panel listing 20 air..... More