here is the link for the website of the author : http://www.kevinhogan.net/ The book gives many advices for business trades by persuasion techniques

I have read a book entitled "Art et science de l'influence : 8 minutes, ou moins pour transformer un Non en Oui" written by Kevin Hogan (I don't know the original title of the book in english because I read a french translation). I enjoyed this book, It's business oriented. You're learning french so you can read it or finding it in english

here you can read pages from the book in english : http://books.google.fr/books?id=pfp_pWLWIIQC&pg=PT50&lpg=PT50&dq=Art+et+science+de+l%27influence+kevin+hogan+titre+original&source=bl&ots=pXICqNeJwu&sig=rXve2_zgPRXN2ZBpbmfKOW0X5KI&hl=fr&sa=X&ei=NG0nU9D5NqiW0AWmooG4AQ&ved=0CFcQ6AEwBQ#v=onepage&q=Art%20et%20science%20de%20l'influence%20kevin%20hogan%20titre%20original&f=false The title is "the science of influence : "The Science of Influence: How to Get Anyone to Say "Yes" in 8 Minutes or Less!" But it's not only about business, it's too for persuasion for other context. The author refers often about business negociation and marketing in the book.

thank you Tim, i think i will search the english copie in order to maintaining time, because i have to read it and summarize it

merci :)