This Luis Sepulveda's masterpiece is very similar to that of Ernest Hemingway, "The old man and the sea". First of all because of the principal character, Antonio Josè Bolivar. Old, solitaire, and great connoisseur of his element: the Cloud Forest, with its magic, its dangers and its deep connections between living creatures. Antonio, as well as the Hemingway's old man, has an enemy in the savage nature: in Antonio Josè Bolivar's case we are talking about a female tigrillo looking for revenge against human beings who killed her male and littles. He come to know the menace because of a dead body flowed down with the river to the village near Antonio's house, wounded by her big nails and jaws. He knows how to recognize those wounds, because he has been part of the Forest for a while: he lived in strict contact with Shuar natives. They teached him how to respect the Forest, how to feel like a part of it and not as its owner: "I was not a shuar, but I was a part of them", he loves to say. People in the village ask for his help, but he declines, he's no more an hunter but an old man who loves to read love stories, a passion came up when he met a priest who told him about how many things books talk about: but Antonio Josè Bolivar just needed love. That's when tigrillo goes on killing people that Antonio understand that he has to do something; an adventure which will take him to stand in front of his own past, to fight against something he deeply respect, and to ask himself who is the dangerous beast. An incredible journey through places which should be defended by the whole human being but known by less people who really care of it. This book represent the hope that the future generations would have more consciousness of how important is to preserve that treasure which Mother Nature gave us, written by the magic pen of a great Luis Sepulveda.