It's funny how books change or don't change over the years. As you all know, Nancy Drew is one of my favs. The book on the left is one of the redone yellow spine books. I bought the entire set of them over several years in the 1980s and early 1990s. I bought my yellow spine 99 steps in about 1994. The one on the right is from 1966. I bought it for 1.49 about 5 years ago at a used bookstore.
Above is the entire set of Nancy Drews in my bungalow bookcase. I can't believe I've been in my house since 2007!
And a few of my vintage ones