Physical Chemistry of Soils provides a comprehensive introduction to the physicochemical principles that govern soil systems. It explains how forces, energy exchanges, and molecular interactions determine soil structure, reactivity, and environmental behavior. The book explores key topics such as surface charge, ion exchange, electrokinetic phenomena, colloidal stability, and the thermodynamics of water and solutes in soils. By combining conceptual clarity with quantitative rigor, it offers a unified framework that links microscopic processes to macroscopic soil functions. Designed for students, researchers, and professionals, it bridges the gap between classical soil science and modern physical chemistry.