What is the value of such a Handbook? Its primary worth is that it gathers all of the important data and ideas about the MMPI in one place and organizes this knowledge in a clear fashion. Volume One will be useful for the beginning MMPI student, because it starts with the simplest material; but it also carries the reader into the material that is complex and recent. For the sophisticated MMPI’er the Handbook is also very useful as a data bank for research and as a reference work; the second volume will also be needed for this purpose.