This is a book about ideas, patterns, and broad unifying themes in physics. Each chapter focuses on a different theme - such as dimensions, transformations, symmetries, and maps - beginning with simple examples accessible to all, then connecting them to more sophisticated realizations in more advanced topics of physics.

• 1: Adding a dimension


• 2: Physics as transformations


• 3: Localization at saddles


• 4: Coins, classical and quantum


• 5: Symmetry


• 6: Maps


• 7: The problem of time


• 8: Complexity and emergence

A.R.P. Rau is a theoretical physicist who has worked primarily in atomic physics and quantum information. He has spent time in universities and research institutions in Australia, Chile, France, Germany, and India.