New York NY: Grosset & Dunlap, 1995. Reprint. Hardcover. ISBN: 0448089122. Very Good with no dust jacket; Blue cover; Hardy Boys Series; Vol. 12; B&W Illustrations; 177 pages.
New York NY: Grosset & Dunlap, 1995. Reprint. Hardcover. ISBN: 0448089122. Very Good with no dust jacket; Shiny blue cover; Hardy Boys Series; Vol. 12; B&W Illustrations; 177 pages.
New York NY: Grosset & Dunlap, 1995. Reprint. Hardcover. ISBN: 0448089122. Illustrated by J. Clemens Gretta Very Good with no dust jacket; Edgewear; Shiny blue cover; Hardy Boys Series; Vol. 12; 177 pages.
New York NY: Grosset & Dunlap, 1965. Reprint. Hardcover. ISBN: 0448089122. Very Good with no dust jacket; Matte Blue pictorial cover; Hardy Boys Series; Vol. 12; B&W Illustrations; 177 pages.
New York NY: Grosset & Dunlap, 2002. Reprint. Hardcover. ISBN: 0448089122. Very Good with no dust jacket; Shiny Blue pictorial cover; Hardy Boys Series; Vol. 12; B&W Illustrations; 177 pages.
New York NY: Grosset & Dunlap, 1965. Reprint. Hardcover. ISBN: 0448089122. Very Good with no dust jacket; Edgewear. Spine weak; Matte Blue pictorial cover; Hardy Boys Series; Vol. 12; B&W Illustrations; 177 pages.
New York NY: Grosset & Dunlap, 1995. Reprint. Hardcover. ISBN: 0448089122. Very Good with no dust jacket; Shiny blue cover; Hardy Boys Series; Vol. 12; B&W Illustrations; 177 pages.
New York NY: Pocket, 1990. First Edition Thus. Paperback. ISBN: 0671674889. Very Good- with no dust jacket; Exlibrary with markings. Wear at edges Reading copy only; Hardy Boys Casefiles; Ex-Lib; Vol. 40; 151 pages.
New York NY: Grosset & Dunlap, 1966. Hardcover. Very Good with no dust jacket; Edgewear. Small stain on edge of pages; Matte Blue pictorial cover; Hardy Boys Series; Vol. 37; B&W Illustrations; 177 pages.
New York NY: Pocket, 1992. First Edition Thus. Paperback. ISBN: 0671730975. Very Good- with no dust jacket; Exlibrary with markings. Wear at edges. Reading copy only; Hardy Boys Casefiles; Ex-Lib; Vol. 61; 153 pages.
New York NY: Grosset & Dunlap, 1965. Hardcover. Very Good with no dust jacket; Edgewear; Matte Blue pictorial cover; Hardy Boys Series; Vol. 44; B&W Illustrations; 176 pages.
New York NY: Grosset & Dunlap, 1992. Hardcover. ISBN: 0448089440. Illustrated by B/w Illus Very Good with no dust jacket; Shiny Blue pictorial cover; Hardy Boys Series; Vol. 44; 176 pages.
New York NY: Grosset & Dunlap, 1965. Hardcover. Very Good with no dust jacket; Edgewear; Matte Blue pictorial cover; Hardy Boys Series; Vol. 44; B&W Illustrations; 176 pages.
New York NY: Grosset & Dunlap, 1961. Hardcover. ISBN: 0448089149. Illustrated by B/w Illustrations Very Good with no dust jacket; Blue pictorial cover; Hardy Boys Series; Vol. 14; 177 pages.
New York NY: Grosset & Dunlap, 1996. Reprint. Hardcover. ISBN: 0448089149. Very Good with no dust jacket; Shiny Blue pictorial cover; Hardy Boys Series; Vol. 14; B&W Illustrations; 177 pages.