I enjoyed the occasional life lesson this book tried to teach. For example, in chapter 6, Cengal reminds us to reevaluate our friends as he compares quality and quantity of heat vs. quality and quantity of friends. In the same section, he also examines why Americans are so fat despite strict 1st law of thermodynamics diet approach (turns out not many of them were aware of the 2nd law). Highly recommended to those who are curious of the laws that EVERYTHING in this universe abides by, explained in the most painful, dry and classic engineering textbook manner.