The Official Guide to Coin Grading and Counterfeit Detection (2nd ed.), text by John W. Dannreuther, edited by Scott Travers. Published 2004 by House of Collectibles.
In the second edition of this award winning book, standards of the world's largest coin grading company, Professional Coin Grading Service (PCGS), are defined and illustrated. This book also explains the fundamentals of counterfeit detection and how to spot altered coins, cast counterfeits and die-struck counterfeits. Tips for handling and storing your collection to preserve coin grades are also included. The 2nd edition adds a new section on grading state quarters. 416 pages with over 600 detailed illustrations.