Whitman Publishing releases annual updates of "A Guidebook of Unted States Coins," commonly referred to as "The Red Book," and collectors consider this book the authoritative resource on the value of U.S. silver dollar coins. A list of other books important to coin collectors is available at SilveraDollarCo.net.
Other books for valuating coins include "The Official American Numismatic Association Grading Standards For United States Coins," which provides information on how to grade a coin's condition. "The Coin Collector's Survival Manual" provides knowledge of the coin-collecting industry and potential pitfalls. "Numismatic Photography" gives pictorial information helping with online coin purchases, and "The Expert's Guide to Collecting and Investing in Rare Coins" provides detailed information on coin value trends.