I enjoyed this book and found it interesting. I believe it should really have been called "Fuel" instead of energy. The difference is subtle but the author really is talking about what and where we derive energy from (sources). I found the book inconsistent at times and this effected its flow. But over all well researched and educational and a worthwhile read.
One MAJOR problem with this book, the Kindle version, and NOT the author's fault was how Amazon digitized it. Most of the diagrams where improperly digitized and as a result they were tiny. Way too small to be seen on a Kindle. And you were not able to enlarge them as in other Amazon Kindle books where yo have the ability to enlarge pictures. Some were properly coded and could be enlarged. But most were not.