This is far from being a comprehensive list. I would stick to the key books still in print, so you have more to invest and spend less on building a library. If you wish, you can find other out-of-print books in their bibliographies. When you have obscene profits from investing in this sector, you'll have plenty of money to throw around on out-of-print books, or whatever.

This is a very basic list, and is far from complete. Everyone investing in gold should have read The Invisible Crash by James Dines before investing.

List:

Financial Crises and What to Do About Them, Eichengreen

The Gold Wars, Lips (about intervention) in print

Essays on the Great Depression, Bernanke in print

Lessons from the Great Depression, Temin in print

America's Great Depression, Rothbard in print

Golden Fetters, Eichengreen in print

The War on Gold, Sutton (out of print)

Bad Money, Phillips in print

The Gold Problem, Curzio (out of print, should be under $50)

A Bubble that Broke the World, Garet, reprint

Ex-America, Garet, reprint

Collapse of the Dollar, Turk & Rubino in print

Forty Centuries of Wage & Price Controls (out of print, should be under $20)

Drastic Measures, Rogoff in print

Crash Proof, Schiff in print

Hyperinflation Survival Guide, reprinted version

Economics of Inflation, Bresciani-Turroni, reprint

Creature from Jekyll Island, Griffin in print

Managing the World Economy, Mills (may be out of print)

Managed Money at the Crossroads, Palyi (out of print)

An Inflation Primer, Palyi (was an American in Berlin in 1923) out of print

Debt and Delusion, Warburton, reprint

Charting 20th Century Monetary Policy, Hoover and Strong 1917-1927. in print

The Great Crash, Galbraith (a Keynesian) in print

From Bretton Woods to World Inflation, Hazlitt (out of print, should be under $60)

Invisible Crash, Dines (out of print, should be $50-$100 Will not be reprinted while Dines lives.) Hint: buy your copy now!

Money Meltdown, Shelton in print

Gold Standard in Theory and History, Eichengreen in print

Many of these books have been rising in price faster than inflation. The Gold Standard in Theory and History by Eichengreen used to be about $50 new just last year, but the publisher increased the price to $71 since they had to do another print job at higher cost. The out of print books are really going up.