Books that actually helped introverts become more confident/social?

I’ve been thinking a lot about how I show up socially. I wouldn’t call myself 100% introverted or extroverted, I can be super outgoing with friends, but in new groups I overthink, get shy, and hold back a lot.

I want to change that and learn how to be more open, confident, and approachable, basically the type of person who can start conversations without awkwardness, and not feel stuck in my head.

So my question is:
what books have actually helped you (especially if you were an introvert) become more social, confident, or comfortable putting yourself out there?

I know about the usual ones like How to Win Friends and Influence People, but I’m looking for things that really made a shift for you personally, like a book that helped you stop being shy, or that gave you a mindset shift that stuck.

Would love any recommendations that worked for you, especially if you started out introverted and managed to open up more.