For those new to Knowles work, this book really is a 'must'. It takes the reader through the essentials of adult education, both in the traditional environments of adult education and in settings such as the workplace. It provides a theoretical framework for understanding the adult learning issues faced by professional educators each day, and also offers significant guidance on future practice. To those who have read past editions of the book, as I have, you will find the Swanson and Holton work true to the spirit of Knowles, and the two authors have introduced more than enough new material to justify buying this Fifth Edition.