Richard S. Yeoman, born Richard Stewart Yeoman on August 15, 1904, and died on November 9, 1988, was a renowned numismatist (coin and currency collector) and author, best known for developing the standard catalog reference for United States coin collectors, popularly known as "A Guide Book of United States Coins." Often referred to as "The Official Red Book," this annual guide, first published in 1946, has become an essential resource in the numismatic community, providing collectors with valuable information on coin history, grading, values, and photographs. His work and contributions to the field of coin collecting have left a lasting legacy, making him a notable figure in numismatic circles.