Jerome Wagner

There are many theories about personality (see Wikipedia). The Enneagram gives us nine very different examples of personality styles, so it is a good introduction to the subject.

I found this book to be very clear and systematic. It is a good reference to the Enneagram, but it might not be enough to get a 'feeling' for the nine types. (I had to read several books for that, anyway.) There is a very helpful introductory chapter with questions to explore your own views and motivations.

Many authors put the Enneagram in a spiritual or religious context, which can be quite frustrating if you do not completely share their beliefs, or simply want to tell religion and psychology apart. Wagner sticks to the psychological side, which makes a good foundation. (Then, if you like to, you can proceed to read about cosmic energies or Christian virtues, and disagree with the respective author on how these relate to the Enneagram.)… (meer)