What energises humans to move and think? Whether we wake up groggy and say that we have no energy to do anything or whether we wake up refreshed and feel ready to tackle the day, scientists and non-scientists alike acknowledge that energy is essential for anything to happen. However, not everyone knows and digs deeper into what energy actually is. In the human body, energy can be followed by looking at one molecule. In "Life's Energy" the reader is guided through our bodies molecular world to understand of how a single molecule, Adenosine Triphosphate (ATP), can drive life. The book goes back in history to see how ATP was discovered. Then it follows ATP around the body and explains what it does, how it is maintained and explores its role in diseases such as diabetes and cancer. Along the way it introduces the scientists involved in ATP research, how their research activity was affected by the rise of the "Third Reich" and why many of them were awarded Nobel Prizes for their insights.