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Who Put That Hair in My Toothbrush?

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Adapted from the English Wikipedia article Who Put That Hair in My Toothbrush?, available under CC BY-SA 4.0Updated 10 August 2025
Little, Brown and Company
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Who Put That Hair in My Toothbrush? is a young adult novel released in 1984 by Jerry Spinelli and published by Little, Brown.

Plot summary

The story is told through the alternating viewpoints of siblings Megin and Greg, who are in seventh and ninth grade respectively, portraying their sibling rivalry. Greg's plotline revolves around his romantic conflict involving two girls, whereas Megin's focuses on forming new friendships with Emile and Zoe.

Business relevance

Penned by the bestselling author Jerry Spinelli, this work is aimed at the young adult audience, exploring themes such as family relationships and teenage interactions. Available in both hardcover and paperback formats, it enhances Spinelli's collection of commercially successful youth literature. The novel’s lasting popularity is evident through its multiple cover variations and its association with Spinelli’s wider literary reputation.

Trivia

  • The characters Megin and Greg are modeled after Spinelli's own children.
  • Leo Borlock, who later becomes a key figure in Stargirl, makes a brief appearance.
  • There are three main cover versions of the book.