THE INVISIBLE INTRUDER: Nancy Drew Mystery Stories 46.
Edition: Later printing.
New York: Grosset & Dunlap, (ca 1985, c 1969.). Hardcover - Cover by Rudy Nappi. Lists to #56 on back cover and on order form in rear of book. Illustrated with a plain frontispiece and 5 internal drawings. Format 19 with oval endpapers. 175 pp. plus 1 pp publisher's ads. ISBN: 0-448-095467.
Condition: Near fine in matte (flat) illustrated boards with a yellow spine.