Bernardo Fernández, aka Bef, is a writer, story teller and graphic designer. He was born in  1972 in Mexico City, México. He has published the novels Tiempo de alacranes (Scorpion Times, 2005), Gel azul (Blue Gel, 2006), Ladrón de sueños (The Dream Thief, 2008), Ojos de lagarto (Snake Eyes, 2009), Hielo Negro (Black Ice, 2011) and Cuello Blanco (White Collar, 2013); the short-stories collections ¡¡Bzzzzzzt!! Ciudad interfase (¡¡Bzzzzzzt!! Interface City, 1998) and El llanto de los niños muertos (The Crying of the Dead Children, 2008); the children's books Error de programación (Programming Error, 1997), Cuento de hadas para conejos (Fairy Tales for Rabbits, 2007), Groar and Soy el robot (I Am the Robot, 2010); and the graphic novels Pulpo cómics (Octopus Comics, 2004), Monorama (2007) and Monorama 2 (2009).

He is one of the best young Mexican writers of our times and he has won several prizes, such as the national novel prize Otra Vuelta de Tuerca (Mexico), the prize Memorial Silverio Cañada for best first crime novel (Spain), Ignotus prize of the Spanish Association of Fantasy, Science Fiction and Horror.