Here's three more books if anyone's interested:
How to Talk to Anyone: 92 Little Tricks for Big Success in Relationships
The first one, How to Talk to Anyone taught me a lot of simple techniques to break into and control any conversation. I learned a lot about the different ways we smile (this blew me away), what people do with their eyes, etc., and it really helped my calibration.
The Art of Mingling: Proven Techniques for Mastering Any Room
I followed that book up with The Art of Mingling, which was amazing to me. It felt like I was reading Mystery Method again, except it had nothing to do with pickup. It was just "how to make every group at a party fall in love with you" kind of stuff. It had opening lines, closing lines, escape plans, etc. When combined with the book prior, my mingling/networking skills have gone up, which is key for anyone who has trouble with approach.
The Art of Seduction
I'm currently reading The Art of Seduction. Robert Greene's a phenomenal writer, and I love his work. It's filled with seduction tactics used by everyone from pick up artists to marketers and politicians. Definitely worth a look!