Bumble Humblestone and the Secret Cargo was beta-tested by a group of children ages 7-12. They read the book and filled out a short one-page questionnaire.
Their parents were people I had met at networking functions, who thought it would be fun to have them volunteer and give me feedback. I don't know any of the children personally.
Portions of the questionnaires have been redacted as they contain spoilers.
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