"The U.S. Mint produces error coins every year on every denomination. From doubled die cents to rotated reverse quarters to missing letters on dollars, these coins can be worth far more than face value. Featuring expert insight, hundreds of close-up images, concise details on what to look for and where, and up-to-date market values, you will learn how to spot and profit from even the most well disguised treasures..."--Page 4 of cover.
