Robert Oakley Collins (1933 – 2008) was a prolific American historian of East Africa and Sudan.
 He published numerous articles and thirty-five books, including "Shadows in the Grass: Britain in the Southern Sudan" (Yale, 1983), which was awarded the John Ben Snow Foundation prize for the best book in British History and the Social Sciences written by a North American.
 He worked as an adviser for Southern Sudan's High Executive Council (HEC) Regional Government in the early 1970s, Chevron Overseas Petroleum in 1981-1991, and the US Government.
 Collins authored many background papers on Sudan and the Middle East aimed at policymakers and, in 1981, he testified before the United States House Committee on Foreign Affairs.
 In 1980 he was awarded the "Order of Sciences, Arts and Art, Gold Class", by Gaafar Nimeiry, the President of Sudan, for his long service to scholarship on the Upper Nile.
Gertrude Franklin Horn Atherton (October 30, 1857 – June 14, 1948) was a prominent and prolific American author.
 Many of her novels are set in her home state of California.
 Her bestseller "Black Oxen" (1923) was made into a silent movie of the same name.
 In addition to novels, she wrote short stories, essays, and articles for magazines and newspapers on such issues as feminism, politics, and war.
 She was strong-willed, independent-minded, and sometimes controversial.
John F. Hamilton (7 November 1893 – 11 July 1967) was an American-born actor who worked for many years in the theatre but only occasionally on film.
 He was known as John F. Hamilton to distinguish him from the much more prolific American film actor John Hamilton and from a British actor of youthful roles who worked in England and Europe in the 1930s
Ralph Matthew McInerny (February 24, 1929 – January 29, 2010) was a prolific American author and Professor of Philosophy at the University of Notre Dame.
 McInerny's most popular mystery book series featured Father Dowling.
 This character was the basis for the Father Dowling Mysteries television show, which ran from 1987 to 1991.
Franz Kamin (May 25, 1941 – April 11, 2010) was a prolific American author, composer, poet, performance-installation artist, and pianist whose works explore structural principles derived from topology, general systems theory, prosody, and meditational processes in unusual combinations of genre and technique.
 He made use of conventional instruments and children’s toys; sound poetry and puppet theater; choreography and speaking chorus; systematic chance operations and both programmed and otherwise uncommon improvisation; performance scribbling and the live reading of narrative texts.
Karin Kallmaker (born 1960) is the prolific American author of lesbian fiction whose works also include those originally written under the name Laura Adams.
 Her writings span lesbian romance, lesbian erotica, and lesbian science-fiction/fantasy.
 Dubbed the "Queen of Lesbian Romance," she publishes exclusively in the lesbian market as a matter of personal choice.
John Martin Taylor, also known as Hoppin' John, is an American food writer and culinary historian, best known for his expertise on the cooking of the American South, and, in particular, the foods of the lowcountry, the coastal plain of South Carolina and Georgia. "
The New York Times" referred to him as "the lowcountry food maven" in a 2006 travel article about Charleston’s culinary scene.
 He is often credited with restoring many traditional southern dishes, and he advocated the return to stone-ground, whole-grain, heirloom grits and cornmeal production.
 "Gourmet" magazine said of Taylor in a March 2006 article: "Artisanal food supplier and cookbook author John Martin Taylor...fueled the back-to-the-stone-ground-grits movement... Taylor's coarse grits and more finely ground cornmeal are used as polenta from Puglia to Puget Sound."
 "Charleston" Magazine named Taylor one of the city's Top 100 Most Influential people in its 337-year history: "Before Hoppin' John's Lowcountry Cooking was published in 1992, Charleston cuisine was unfocused.
 Thanks to Taylor, we took pride in our produce, seafood, biscuits, and sweet tea.
 And foodies of the world agreed."
 In an article that originally appeared in "The Atlanta Journal", the culinary historian Karen Hess is quoted as saying, "I don't know of anyone who has done more for Southern cookery."
 The author of the article added, "Taylor has a Capote-esque acid wit, boyish charm and all-consuming passion for food that has won the writer a faithful following."
John Martin's Book was a children's magazine aimed at five- to eight-year-olds.
 Martin Gardner wrote that it was a "pioneering publication" and the "most entertaining magazine" aimed at this age group published in the US.
 Priced from 10 to 50 cents over its twenty-year run, it was primarily purchased by middle and upper income families due to its cost.
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 literature—especially 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.
Mary Jane Holmes (April 5, 1825 – October 6, 1907) was a bestselling and prolific American author who published 39 popular novels, as well as short stories.
 Her first novel sold 250,000 copies; and she had total sales of 2 million books in her lifetime, second only to Harriet Beecher Stowe.

Question: Which prolific American author praised John Martin's Book?
Answer: Martin Gardner