Influence by Cialdini is really good and reasonably deep. Presuasion (also him) is more accessible and focused a lot more specifically on manipulative sales tactics.

If you read both of those and still want more, Nudge by Richard Thaler is pretty good as well.

Edit: one extra that's not about in person manipulation, but how you're manipulated before the interaction by branding: Brandwashed by Martin Lindstrom.