Young Mario Lucas is fascinated by the world of the stars. He was absolutely certain that in one of those far off places, on the Pulsars, lived "The Little Green Men". These pacific, galactic beings, who observe everything from high above, would come down to Earth to sort out the mess the humans were in. It was just a matter of waiting. Mario, his sister Fabiola and Don Avelino, the old bookseller, among other characters, are to be in charge of receiving them when they come. A new book by José González Torices filled with adventures, wonders, legends about the Universe that will make"your heart think".