The book is mostly rubbish. Some common sense basic techniques with some ludicrous, almost cartoonish ones as well. This is the kind f book you may pick up at an airport to skim read through on a sort flight and either give away for someone else to read or more likely throw it in the bin. SEAL wannabes and groupies may cherish it's "deadly skills". Anyone with basic knowledge of personal security, self defense and escape and evasion skills don't waste your money.