I have strong symptoms of being a narcissist, what books can I read for self-help?

My best friend today said you have a narcissist personality. I didn't take it to heart since I didn't know what it meant, but now I know. Confirming with my younger brother, he said, "yeah, I mean I didn't know it was a thing, but yeah you'd be described as a narcissist if people knew you well enough."

With that being said it still didn't hurt, because yes, deep down inside I have been arrogant and egocentric that I could believe why my best friend said that to me.

They went on to say, "Its scary how disillusion you are." You don't need a therapist per say, but you should definitely seek help."

The conversation took over text, so its easier to take the hit and easier to be open. But anyways, I'm not offended at all. I don't quite 100% believe it, but I do think I have 95% of the qualities that define a narcissist.

I'm fortunate enough, that I asked my friend about their opinion on me, since apparently I give my opinion on everything without being asked. They said its "so rude and immature." "I have love for you, but its uncalled for and borderline retarded sometimes." No offense taken.

They also said that, if you don't figure this out soon, you will not be "living." There is so much to be embraced on this planet but you won't be able to until you become open-minded and make a reason for why people love you for who you are, not who you proclaim to be.

Anyways, I ask for any source of Self-Help Books, CDs or Tapes that I can read or listen, so I can fix this!