Larry Gonick, a cartoonist specializing in nonfiction books, is best known for his Cartoon Histories and his Cartoon Guides to various sciences. He lives in San Francisco. Tim Kasser, a professor of psychology at Knox College in Galesburg, Illinois, has spent two decades researching materialism, consumerism, capitalism, well-being, and the environment. He has written three books and consults with a variety of non-profit organizations.