James F. Ruddy
1988 (17th edition)
Considered the most highly acclaimed and preferred of its kind, the newest edition of the universal coin-grading encyclopedia by James F. Ruddy showcases over 1000 enhanced coin-grading pictures and adjectival descriptions of regular issue U.S. coin types from 1793 to date. Designated in 1972 as an Official Grading Guide of the American Numismatic Association, Photograde is widely accepted as the most complete grading book ever printed. In fact, over 500,000 copies have been sold to date.