The cover of the book "Huerfanoos de Sofia" by José Maria Bech, Damian Cerezuela Frias, Ana de Lacalle, Alex Mumbru, Manuel Muxico, Ignacio Pajón Leyra, Francesc Perena, Jacísto Rivera de Paredes, Román María Sánchez de Leon Serrano, Ramón Sanchez, Agustín Serrano de Haro, and Prologo de Javier Goma, features a black and white illustration of a skull with a human face, butterflies, and text in Spanish.