Modern scholars have been introduced to James's psychology primarily through his great book, The Principles of Psychology of 1890. However, people who studied psychology at the turn of the 19th and 20th centuries got to know the author through this book. Despite the title, this work is not just a compilation of "The Principles of Psychology". For example, the author added some chapters devoted to the physiology of the senses, and it helped to link James's psychology with other sciences of that period. Psychology: Briefer Course is still a useful and easy-to-read introduction to William James's views and is an essential resource for anyone interested in his scientific work.