El secreto de los ninja

This book is different from the others. What happens in this story is ONLY in your hands. You will have to avoid great dangers and a bad decision could end in disaster... But do not despair. At any moment you can go back and choose another option, alter the course of your story and change your destiny. This is your mission: you will travel to the past to investigate a mysterious samurai sword that has appeared in your friend Nada's dojo. Will you be able to learn the secrets of ninja skills before the dangers of feudal Japan destroy you?