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Children's Fiction Mysteries & Detective Stories

The Triangle Secret

by (author) David Cole

illustrated by Shannon O'Toole

Common Deer Press
Initial publish date
Apr 2022
Mysteries & Detective Stories, Friendship, Emotions & Feelings, General, Mathematics
  • Paperback / softback

    Publish Date
    Apr 2022
    List Price

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Where to buy it

Recommended Age, Grade, and Reading Levels

  • Age: 10 to 12
  • Grade: 4 to 6


When FBI Special Agent Carlson is kidnapped in Egypt while investigating the plane crash of an eccentric billionaire inventor, Jordan and his friends spring into action. Catherine, The Math Kids must unravel the clues in Howell's mysterious will before it's too late. If they can't figure out the secret of the triangle in time, Howell's money will be gone forever.Now the Egyptians are after the Math Kids, too. In their most exciting adventure to date, the four friends will need all their math skills to save their FBI friend and find the missing money.

About the authors

David Cole's profile page

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

Shannon O'Toole's profile page

Editorial Reviews

"The Triangle Secret continues a streak of fun mystery adventures."

Foreward Reviews, March/April 2022

Other titles by David Cole

Other titles by Shannon O'Toole