Economics

A Treatise on Political Economy by Jean-Baptiste Say
http://www.econlib.org/library/Say/sayT.html

Money and banking

Gold and Liberty by Richard M. Salsman
http://www.amazon.com/Gold-liberty-Economic-education-bulletin/dp/B0006P...

Breaking the Banks: Central Banking Problems and Free Banking Solutions by Richard M. Salsman
http://www.amazon.com/Breaking-Banks-Problems-Solutions-Education/dp/B00...

"The End of Central Banking, Part I and II" by Richard M. Salsman
http://www.theobjectivestandard.com/issues/2013-spring/end-of-central-ba...
http://www.theobjectivestandard.com/issues/2013-summer/end-of-central-ba...

"A Gold-Price Rule as a Middle-Ground Path to a Genuine Gold Standard" by Richard M. Salsman
http://www.freebanking.org/2013/05/07/a-gold-price-rule-as-a-middle-grou...

The Great Depression

"The Cause and Consequences of the Great Depression" by Richard M. Salsman, The Intellectual Activist, 2004