It's not about sales it's about how people think, act, and make decisions. I would bet that most any book on sales will invariably touch on at least some of the topics covered in this book.
It's a fun read and I promise you will start to see these patterns being used in everyday life in verbal and non-verbal communication.
Start with How to Win Friends and Influence People, by Dale Carnegie. Ignore the cheesy-sounding title; this book was written in the 1930s and has been in print continuously ever since, which speaks to its effectiveness. I also recommend To Sell Is Human, by Daniel Pink (and all of Daniel Pink's other books, as well).
