"Introverts aren’t comfortable with traditional tactics like aggressively pushing a product or talking over a customer’s objections. That’s the beauty of The Introvert’s Edge: it doesn’t focus on the sale itself but on a sales system that helps introverts feel sincere instead of sales-y." says the blurb.
The book is true to this. It offers practical solutions to the 'the only way to sell is to pick up the phone and cold call people until you're done' dilemma. I think even extroverts would benefit from the stories. They're real, and get you thinking about your personality and how to use your strengths to do the job differently, well and in a way that is true to yourself. All good things, that should result in better outcomes, in my view.
I especially enjoyed the story-telling aspect of the book, and found it most useful.
You may also enjoy The Introvert Advantage by Marti Olsen Laney.