PCGS Guide to Coin Grading and Counterfeit Detection

This book illustrates and explains with precise descriptions and digital images how you can determine the exact condition of a coin. Here is a coin grading volume so complete that—like its author, PCGS—it indeed sets the standard for grading coins. The standards for grading all United States coins, including precise definitions of Mint State and circulated grades. It encompasses grading standards of the Professional Coin Grading Service.
The Official Guide to Coin Grading and Counterfeit Detection, Edition #2