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- Kathleen T. Horning. "On Spies and Purple Socks and Such." The Horn Book. March 26, 2013. June 28, 2017. <http://www.hbook.com/2013/03/choosing-books/horn-book-magazine/on-spies-and-purple-socks-and-such/#_>.
- Neva Grant. "Unapologetically Harriet, the Misfit Spy." NPR. March 3, 2008. July 8, 2017. <http://www.npr.org/templates/story/story.php?storyId=87779452>.
- Joan Wickersham. "The Literature of Bullying." The Boston Globe. September 20, 2013. July 7, 2017. <https://www.bostonglobe.com/opinion/2013/09/19/bullying-literature-learn-from-harriet-spy/MzGh9c7kHq6bq9un31b3gI/story.html>.
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