Well, I do have stories with several narcissists, given they're everywhere! I already wrote about one story here:

https://medium.com/illumination/what-is-meant-by-emotional-imbalance-11d81a6cf2cb

I also wrote 2 articles about their danger on kids in case the narcissists are either the caregivers or teachers:

https://medium.com/illumination/shall-we-take-our-kids-sanity-more-seriously-dba1e26f6c88

https://medium.com/the-innovation/how-can-you-help-your-kids-healthy-development-in-relation-with-school-and-play-eb811ab13e97

Nonetheless, I would highly recommend people who have any single doubt to get educated in detail from clinicians and experts who specialized in narcissistic abuse recovery. This YouTube channel is great for the purpose:

https://www.youtube.com/channel/UCIELB1mz8wMKIhB6DCmTBlw

It could be really tricky and complicated to summarize such a topic in an article.