Wikipedia: Small is Beautiful, 1973.
I read Small Is Beautiful: Economics As If People Mattered by E. F. Schumacher a couple of years after college. As for much of what I have learned about finance, economics, and other subjects, it came from outside of a formal classroom environment.
You can find original and updated editions of this book at Powell’s Books, download (legally) a PDF copy, or read an embedded version below.
Also, last November the Guardian published a short (12 minutes) audio about this book on its Big Ideas blog.
