This book is written for anybody who is curious about nature and motion. Have you ever asked: Why do people, animals, things, images and space move? The answer leads to many adventures; this volume presents those due to the discovery that there is a smallest change value in nature. This smallest change value, the quantum of action, leads to what is called quantum physics. In the structure of modern physics, quantum physics covers three points; this volume covers the introduction to the point in the lower right: the foundations of quantum theory.
Christoph Schiller, “The Adventure of Physics - Vol. IV: The Quantum of Change,” Open Educational Resource (OER) , accessed October 22, 2020, http://oer.iain-padangsidimpuan.ac.id/items/show/2257.