Patterns of the Hypnotic Techniques of Milton H. Erickson, M.D, Vol. 1-2
If you ever wanted to learn NLP or hypnosis then this is the center of the vortex. Everything about modern persuasion goes back to the unassuming Milton Erickson. Everyone from Richard Bandler to Tony Robbins owes a great debt to him. This and the second volume is the definitive guide to hypnosis. What out though it is not an ordinary book. It is for doctors as such. Meaning that if you haven't come across the topic of hypnosis then read up on it before getting this book. Very technical.
You'll never feel like an outsider again when you use the secret communication techniques revealed in these programs. You'll be able to recognize the 10 common phrases you should never use in everyday conversation appropriate and engrossing with the Small Talk Secret Checklist. And you'll learn the magic words that soften up even the toughest talkers. With this program, you'll even learn now to play "Conversation Hardball" and win!
What Every BODY is Saying: An Ex-FBI Agent's Guide to Speed-Reading PeopleRead this book and send your nonverbal intelligence soaring. Joe Navarro, a former FBI counterintelligence officer and a recognized expert on nonverbal behavior, explains how to "speed-read" people: decode sentiments and behaviors, avoid hidden pitfalls, and look for deceptive behaviors. You'll also learn how your body language can influence what your boss, family, friends, and strangers think of you.
There are not so many books about language learning, but this is the best one I found. Short, witty and precise, it tells you all the basics of language learning on your own.