A Guide Book of United States Coins (Red Book), by Richard (R. S.) Yeoman, ISBN 0-7948-2039-5, is a pricing guide for United States coin collectors, and is considered one of the most authoritative coin price sources. The book is the longest running coin price guide. The first edition, dated 1947, went on sale November 1946. After the first three editions (dated 1947, 1948, 1949), the Guide Book was not published in 1949; annual publication resumed in 1950 with the 4th edition (dated 1951–1952) and has continued to this day. The book's all-time peak print run for a single year was 1.2 million copies in 1965. The 70th edition, cover-dated 2017, was published in 2016.