The theory of relativity, quantum mechanics, particle physics, and cosmology are the four pillars of modern physics. Life in the 21st century is unimaginable without them: the special theory of relativity renewed our understanding of space and time; countless everyday objects like transistors, computer chips, and mobile phones are based on the laws of quantum mechanics; in particle accelerators, we investigate the building blocks of matter, and with telescopes, we take an ever-deeper look into the universe's past. When one picks up relevant textbooks on these topics, they are overwhelmed by the abundance and complexity of the mathematical formulas. This book by the renowned physics professor David J. Griffith is refreshingly different. Through many illustrative examples and entertaining stories, always with a wink, it introduces the subject matter.