Roget's International Thesaurus is the most comprehensive and useful thesaurus available today. It is a true thesaurus. It remains faithful to the original system of word association put forward by Dr Peter Mark Roget in the nineteenth century-a concept that has proved so fundamental and valuable that it is being used in research to simulate human intelligence in computers
Barbara Ann Kipfer, Ph.D., is a lexicographer who has authored or compiled more than forty books, including the Dictionary of American Slang (with Robert L. Chapman), The Order of Things, Writer's Digest Flip Dictionary, and the bestselling 14,000 Things to Be Happy About. She received her doctorate in linguistics from England's University of Exeter.