Thank you, Rich Cochrane, for writing this book. This book offers a concise but understandable explanation of the 50 most complex equations. The author helps you grasp the meaning of the equations by breaking them down into simpler steps. The question "Why is it important?" in particular brings the equation to life.
Just one question... Entropy, the Romeo and Juliet of the laws of physics, why do you write it with the Bolzman constant and not as dS = dQ/T?