Rosario and her brother live with a monster. He is strong and tall; he foams at the mouth, and his eyes often turn red. Can or should a story of domestic violence be offered to children in the form of a picture book? We believe that Daniel Martín and Ramón Trigo have managed to do this with much sensitivity and intelligence, offering us a very good book which could be of much use, especially in schools, for tackling the subject of domestic violence.