When Narcissism Comes to Church: Healing Your Community From Emotional and Spiritual Abuse, by Chuck DeGroat

I skimmed this one. It seems like a pretty basic introduction to narcissism. The unique thing that it offers is that it describes how narcissistic traits manifest in each of the Enneagram personality types. Given that the Enneagram is pseudoscientific nonsense with no grounding in research, I'm not sure how valuable that is. But I guess it can help by showing different ways that narcissism can show up in different people.