This rare and collectible 1966 edition of Nancy Drew's The Mystery of the 99 Steps, written by Carolyn Keene, is a must-have for any fan of mystery and thriller novels. The hardcover binding is sturdy and long-lasting, ensuring the book will stay in great condition for years to come.

The book is in English and published by Grosset & Dunlap, making it a great addition to any collection of North American literature. The story follows Nancy Drew as she tries to uncover the mystery behind the 99 steps and is perfect for those who enjoy a good detective story. The book belongs to the categories of Antiquarian & Collectible books and would make a great addition to any bookshelf or collection.