Conversation so far:
Was he a writer?
Carroll is the author of Becoming a Critical Thinker.
What was the book about?
a textbook for introductory logic and critical thinking courses.
Did he write anything else?
Carroll also wrote a children's version of the Skeptic's dictionary which was released online on July 22, 2011.

Question: What was that about?
Self-contained rewrite: What was Robert Todd Carroll's children's version of the Skeptic's Dictionary about?