Carolyn Keene

The Triple Hoax is the 57th book in the series of Nancy Drew. It was the first paperback Nancy Drew produced by Simon & Schuster under the Wanderer imprint. In 2005, Grosset & Dunlap reprinted it in the yellow hardback format.

The Twin Dilemma is the 63rd volume in the Nancy Drew Stories series.

Once again, Nancy faces two puzzling mysteries at once! The first concerns a valuable collection of rare books that Mrs. Horace Merriam commissioned anart dealer to sell--has he swindled her instead? The second mystery revolves around the baffling theft of a beautiful marble statue. To solve both mysteries, the famous …

The Witch Tree Symbol is the thirty-third volume in the Nancy Drew Mystery Stories series. It was first published in 1955 under the pseudonym Carolyn Keene. The actual author was ghostwriter Harriet Stratemeyer Adams.