This new book on Improving Agricultural Extension is the third in a series that was started in 1972. In the first edition ofAgricultural Extension: A Reference Manual, Addison H. Maunder authored and edited a wide range of material that first defined “extension” as a field of study and practice, then went on to explain about extension programme development and different extension teaching processes, and ended with a section on extension management. At the time this first volume was written, many developing countries were just in the process of establishing their agricultural extension organizations. Therefore, this first reference manual became both an essential handbook to extension managers and programme leaders, as well as a basic textbook for students preparing to enter the extension profession.