"Separation Process Principles" by J. D. Seader is a comprehensive textbook that focuses on the fundamental concepts and methodologies used in the design and analysis of separation processes in chemical engineering. The book covers a wide range of topics, including mass and energy balances, equilibrium stages, and various separation techniques such as distillation, absorption, adsorption, and membrane processes. It emphasizes both the theoretical underpinnings and practical applications, providing detailed examples and problem-solving approaches. The text is designed for students and professionals in chemical engineering, offering insights into both the physical principles and the engineering practices required for efficient and effective separation processes in industrial settings.