11 ms·What does Voss' class have that's not in his book?by medell 6y agoWhat does Voss' class have that's not in his book?ipnon 6y agoLive demonstrations The book was too abstract for me. Seeing Voss in the act allowed me to imitate him.tianzhi 6y agoI'll have to check it out then. I liked the book, but so much of negotiation is body language and tone.