This book is a real treasure for anyone who wants to understand what life on Earth is all about and why we are the way we are. After you have read "The Selfish Gene", this (admittedly far more specific and complicated) work is the mandatory follow-up.
But talk about a misleading title! (Dare I say "cheap sales trick"?) Of course, strictly speaking, this book is about power - meaning "power" in the sense of "energy", not in the sense of "power over something or somebody". It is about sex - but only in the sense of "how did two-gender organisms emerge", not in any sexy meaning. And it's about suicide - it describes how occasionally cells die willingly if it benefits the organism as a whole. So if Mr. Lane would say under oath that this book is about power, sex and suicide, he could not be convicted of perjury. On the other hand, I don't think there are many people in the world who, seeing the title "Power, Sex, Suicide", would expect to find a book on... mitochondria!
And this book is about mitochondria. They are organelles inside the cells and they supply cells with energy. It doesn't sound like a big deal, but according to this book, mitochondria are the crucial piece of the puzzle that has made life as we know possible. When you read this book, you'll learn that amoeba (one-cell organisms who have mitochondria) are actually closer to humans than to bacteria (one-cell organisms without mitochondria). You'll also learn why bacteria can never evolve into multicellular organisms, and even why Richard Dawkins's "selfish gene" theory isn't applicable on bacteria. Also, the emergence of multiple sexes (there are species that have more than two) and the phenomenon known as cell suicide have been caused by mitochondria. The part on antioxydants was also rather interesting.
Finally, Mr. Lane suggests that the emergence of mitochondria was such a hugely improbable coincidence that it's quite possible that it has never occurred anywhere else in the universe. It means that it's plausible to assume that Earth is the only place where there is any life above the level of bacteria.
My only big complaint is that Mr. Lane just can't do without pathetic politically correct apologies whenever touching subjects that have to do with (human) gender relations.