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A Knotty Problem

The Math Kids



David Cole

Shannon O'Toole

When Stephanie finds out her soccer team has a tournament on the same day as the district math competition, an upset Justin offers her a choice: choose Math Kids or leave the club. Dismayed by his attitude, Stephanie quits and Catherine goes with her. With their club in shambles, the future of their friendships is further threatened by the news that Justin's dad has been offered a new job and wants to move his family to St. Louis.

Jordan, Justin, Catherine, and Stephanie may face the permanent fracture of their friend group and a bleak end to their school year—unless they can come together to overcome some impossible situations.

Problem-solving skills apply to much more than homework in the latest addition to the Math Kids series.


October 3, 2022

186 Pages | 6 × 9

Middle Grade (9-12)

ISBN 9781988761732



"Ably demonstrates finding thoughtful solutions for common problems." – Kirkus Reviews

"Capped off with a tense final math showdown (the full solutions for which are included in the book’s informative appendix), A Knotty Problem continues the Math Kids series’ streak of providing entertainment and enlightenment." – Foreword Reviews

About the Author:

David Cole has been interested in math since he was a very young boy. He pursued degrees in math and computer science and has shared this love of math at many levels, including teaching at the college level, coaching elementary math teams, and running a summer math camp. He also has a love of writing and has written a number of plays that have been performed. The Math Kids was born of a desire to combine his interests and exercise both sides of his brain at the same time. Find him on his website or on Facebook, Twitter, and LinkedIn.

About the Illustrator:

Shannon O'Toole is a Toronto based illustrator, painter and elementary school teacher. Her playful illustration work is inspired by the unique and humorous characters in her life. Aside from illustrating books for children, Shannon has exhibited her artwork in galleries across Ontario. When she is not drawing, Shannon can be found curled up with her dog, Edgar watching old movies. You can visit her online at or follow her on Instagram @shannonotooleart

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