The Boxcar Children # 38 The Mystery of the Purple Pool (Used Paperback) - Gertrude Chandler Warner

Henry, Jessie, Violet, and Benny used to live alone in a boxcar. Now they have a home with their grandfather and they’re going on an exciting trip to New York City! The children have a great time visiting the Empire State Building and ice skating at Rockefeller Center. But they discover something very strange at the hotel swimming pool: Someone has dyed the water bright purple! Who would do that? And why?

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