I was a little disappointed with this book I thought was more convenient. The techniques may be effective but it will take you months or years to learn a few things (in my opinion) DEPLUS I must say I quite open mind but sometimes the assertions made by the author are a little hard to swallow for me. Good in the end I think it's a book that can have a place in your collection. Personal development but there's clearly better to read before! For example the book "Change" I just finished that is in the same category as "influence and manipulation" Cialdini
