Detailed Instructions: In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.
Q: Martin Gardner (October 21, 1914May 22, 2010) was an American popular mathematics and popular science writer, with interests also encompassing scientific skepticism, micromagic, philosophy, religion, and literatureespecially the writings of Lewis Carroll, L. Frank Baum, and G. K. Chesterton. He was considered a leading authority on Lewis Carroll. "The Annotated Alice", which incorporated the text of Carroll's two Alice books, was his most successful work and sold over a million copies. He had a lifelong interest in magic and illusion and was regarded as one of the most important magicians of the twentieth century. He was considered the dean of American puzzlers. He was a prolific and versatile author, publishing more than 100 books. Question: Which prolific American author praised John Martin's Book? Answer: Martin Gardner
A:
He was a prolific and versatile author, publishing more than 100 books.