New and improved with more error coins and types. The most comprehensive guide available with all known coin errors recognized by the major encapsulation services, NCG, ANACS, PCGS, and sold by credible auction houses. Included is valuable information for collecting US coins. •The minting process from US Mint sources •A detailed description of mint error classifications and how they occur. •A comprehensive listing of all US error coins encapsulated by PCGS, ANACS, and NGC. •Updated listing of all known error coins by coin, date, and auction sale prices. •Photographs of some modern day coin errors.