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: "In Nature too, much may exist that we do not like. But we cannot change the essential character of natural events. If, for example, someone thinks — and there are some who have maintained as much — that the way in which man ingests his food, digests it, and incorporates it into his body is disgusting, one cannot argue the point with him. One must say to him: There is only this way or starvation." - Liberalism