The focus of our attention in our continuing energy crisis is oil. What is oil? Where does it come from? How did we find out about it? What can we do when the oil wells run dry? In this usual clear style, Asimov answers these questions for all young people who have an interest in America’s energy future.

Like How Did We Find Out About Coal? or How Did We Find Out About Energy? this is one of the numerous “How Did We Find Out” books to concentrate on a source of power. It covers the material well and is an excellent place for its target audience to go for information on the subject.