William James was the older brother of novelist Henry James, and a pioneering psychologist and philosopher. His works pushed the boundaries of psychology and helped shape the direction the field would grow in. Collected here are four of his most important books: 'Essays in Radical Empiricism', 'The Meaning of Truth', 'The Varieties of Religious Experience', and 'What is an Emotion?' These books helped forge a field and remain as important today as when they were first written!