The Boxcar Children are thrilled to visit their cousin Chad and his father, Mr. Piper, in Chicago. The day after they arrive, Willard the doorman hands them an envelope with a clue to a mystery inside. The riddle leads the children to a Chicago landmark where they stumble upon yet another clue! Activity section included.

The Windy City Mystery 1998, Albert Whitman & Company

ISBN-13: 9780807554487

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The Windy City Mystery 1998, Albert Whitman & Company

ISBN-13: 9780807554470

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The Windy City Mystery 1998, Turtleback Books

ISBN-13: 9780613090919

Turtleback School & Library edition

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Windy City Mystery 1998, Turtleback Books

ISBN-13: 9780606132190

Turtleback School & Library edition

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