During a visit to the Chicago Cubs' Wrigley field, cousins Mike and Kate investigate why someone has been tampering with the famous ivy vines growing on the outfield walls. Includes historical note.

The Wrigley Riddle 2013, Random House Books for Young Readers, New York, NY

ISBN-13: 9780307977762

Trade paperback

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The Wrigley Riddle 2013, Turtleback Books

ISBN-13: 9780606269988

Turtleback School & Library edition

Hardcover

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The Wrigley Riddle 2013, Random House Books for Young Readers, New York, NY

ISBN-13: 9780307977779

Hardcover

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