The solution, says Daniel Clery in this deeply revelatory book, is to be found in the original energy source: the Sun itself. There, at its center, the fusion of 620 million tons of hydrogen every second generates an unfathomable amount of energy. By replicating even a tiny piece of the Sun’s power on Earth, we can secure all the heat and energy we would ever need. The simple yet extraordinary ambition of nuclear-fusion scientists has garnered many skeptics, but, as A Piece of the Sun makes clear, large-scale nuclear fusion is scientifically possible—and perhaps even preferable to other options. Clery argues passionately and eloquently that the only thing keeping us from harnessing this cheap, clean and renewable energy is our own shortsightedness.