The Charisma Myth by Olivia Fox-Cabane is pretty solid, but actually implementing the concepts in practice versus simply understanding them in theory is always the hard part. I used a combination of Anki flashcards and Readwise [0] to decent success. I also worked with an incredible communication coach in SF.

The Charisma Myth, FYI, is that you’re naturally born with charisma. The reality is that charisma can be nurtured.

[0]: https://readwise.io (full disclosure I am one of the creators)