What do people want most on a hot summer day? A cold drink. Nancy has a great idea: a lemonade stand in the park. It's a perfect plan, except for one thing. No lemons! Somebody took them. But who would want a big box of lemons? Finding out could be fun, though. Because Nancy's looking for clues in a very surprising place.

Carolyn Keene is the author of the ever-popular Nancy Drew books.