Leonard E. Read was the founder of the Foundation for Economic Education — the first modern libertarian think tank in the United States — and was largely responsible for the revival of the liberal tradition in post–World War II America. Mises.org will be putting all of his books online for free. See them all here.
Ludwig von Mises: "Monetary calculation and cost accounting constitute the most important intellectual tool of the capitalist entrepreneur, and it was no one less than Goethe who pronounced the system of double-entry bookkeeping one of the finest inventions of the human mind." - Liberalism