Ohara Publications ., — 1983 . — 143 p . — ISBN: 0-89750-090-3 Stephen K. Hayes , the Western world's foremost authority on the art and practice of ninjutsu , began his search for the way of martial truth during his teen years in Ohio . Over the years , he has established a unique bridge between East and West , adapting the centuries-old art of ninjutsu to the contemporary needs and stresses of our society