after a first reading, I will now that the price is reimbursed by the information issued in this book, I really enjoyed myself has read the first time diagonally, martial arts instructor is here we find a different and practical approach to aggression and more in all these psychological physical forms home internet car, I think all the topics are discussed in the book is small size it can be taken anywhere and is more robust to be used to defend yourself ... I recommend it affordable for all people concerned about his safety and that of those relatives.