Entropy

Entropy is an idea that is no less important than energy, but it is not widely understood. We are surrounded by free energy: what we value is energy that's not too polluted with entropy. This book explains how the concepts of energy and entropy were separated from one another over half a century.

James Binney, FRS, is an astrophysicist at Oxford University. He is the co-author of The Physics of Quantum Mechanics (2013) with David Skinner, along with Astrophysics: A Very Short Introduction.