Since 1946 the Guide Book of United States Coins (the "Red Book") has served collectors as the preeminent annual reference for coin specifications, mintages, values, and photographs. With more than 22 million copies in print, the Guide Book is well established as the hobby's most popular reference. Now in its 2nd edition, the Professional Edition of the Guide Book of United States Coins builds on this strong foundation. This expanded and enlarged volume is intended for the intermediate to advanced coin collector, the professional coin dealer, the auctioneer, the researcher, and the investor. Its combination of more photographs, detailed higher-grade valuations, listings of additional varieties (with closeup photographs) and rare early Proof coins, certified-coin population data, auction records, and other resources provides a wealth of information on every coin type ever made by the U.S. Mint.