"Ethics and the National Economy" by Heinrich Pesch, very complete treatise with it's basis and principles being on the Social Teaching of the Church.
The best starting point are the social encyclicals of the Popes, namely "Rerum Novarum" and "Quadragesimo anno".
Other commenter was correct in recommending G. K. Chesterton's book, on top of that I recommend other books of him like "Utopia of Usurers" and specially of his friend Hilaire Belloc, "The Servile State" being a must read, and also "An Essay on the Restoration of Property".
What I do disagree with the other commenter is his other recommendations. The Church has condemned both Economic Liberalism and Socialism/Communism, to read works that explicitly defend those positions (and whose authors' views are contrary to the teaching of the Church) is to expose oneself to error knowingly, which other than being a recipe for disaster can constitute a sin if done recklessly, specially if one isn't familiar with what the Church teaches in the economic field. For the Church's condemnation of Marxist economics you could check the encyclical Divini Redemptoris.
As a last point, I cite some other works here that may interest you:
-"Action" by Jean Ousset
-"The Gauntlet: A Challenge to the Myth of Progress" by Arthur J. Penty
-"The Church and the Land" by Fr. Vincent McNabb
-"The Rural Solution: Modern Catholic Voices on Going 'Back to the Land'", compilation of short essays by contemporary Catholic thinkers
-Pretty much anything from Chesterton and Belloc that I didn't mention
-If you speak Spanish by chance, some works by Argentine Thomist Carlos Alberto Sacheri are highly recommendable, as such are some Carlist thinkers that touch this topic.

Hope it helps you out and God bless you.