Claim: The Secret in the Old Lace, published in 1980, is the 59th volume of the Nancy Drew Mystery Stories.
Evidence: The Secret in the Old Lace is the fifty-ninth volume in the Nancy Drew mystery series. It was ghostwritten by Nancy Axelrad and first published in 1980 under the pseudonym Carolyn Keene under the Wanderer imprint of Simon and Schuster. 
October 31, 1980 The Secret in the Old Lace is the fifty-ninth volume in the Nancy Drew mystery series.