"Sources of Power" is a two-volume set of books:
Weissenbacher, Manfred. Sources of Power: how energy forges human history
Vol.1- Before oil: the ages of foraging, agriculture, and coal
Vol.2- The oil age and beyond
ABC-Clio/Praeger/Greenwood, 2009;
ISBN-10: 0313356262;
ISBN-13: 978-0313356261
READ A SAMPLE CHAPTER >> at Google Books
