The following are a list of books about Precious Metals, i.e., gold and silver and its natural enemy fiat currencies:
"Silver - The Restless Metal" by Roy W. Jastram
"Extraordinary Popular Delusions and the Madness of Crowds" by Charles Mackay
"Gold Wars" (The Battle Against Sound Money as Seen From a Swiss Perspective) by Ferdinand Lips
"The Reigning Error" by William Rees-Mogg
"The Twilight of Gold" by Dr. Melchior Palyi
"The Invisible Crash" by James Dines
"The U.S. Dollar - An Advance Obituary" by Dr. Franz Pick
"Human Action" by Ludwig von Mises
"How to Invest in Gold Stocks" by Donald J. Hoppe
"Gold and Liberty" by Richard M. Salsman
"The Monetary Sin of the West" by Jacques Rueff
"The Arena of International Finance" by Charles A. Coombs
"The Origin of Money" by Carl Menger
"Economics" by Paul E. Samuelson
"The Silver Bulls" by Paul Sarnoff
"The Golden Constant - The English and American Experience 1560 - 1976" by Prof. Roy Jastram
"The Case for Gold in the 1990's" by Michael Kile
"Switzerland Drops to its Knees" by Swiss lawyer Luzi Stamm (English Translation)
"Between the Alps and a Hard Place" by Angelo M. Coevilla
"Guide to Investing in Gold and Silver" by Michael Maloney
"The Road to Ruin" by James Rickards