A book for Law EnforcementJames O. Pyle is a veteran interrogator and intelligence-training instructor. He has worked for the Pentagon and the Defence Language Institute. Maryann Karinch is a body language expert and author.Maryann Karinch is an American author, literary agent, and a speaker and consultant on body language. She is also known for her athletic endeavors including completion of the first Eco-Challenge and regional awards in body building and gymnastics. The best audience for this material is government officials, police, lawyers, investigators, and anyone who writes or negotiates complex sales contracts. NOTE: For the majority of these techniques to work you need a captive audience. See book reviews on parenting , self help and relationship on the Book Matrix