SINOPSIS DEL LIBRO

<p>A missing explorer, mysterious stone formations, a sign in the sky - geologist Ella Jordan is faced with a mystery. As she ventures down to the lowest point on Earth, the events seem to make a terrible sense. From the Mariana Trench, signals emerge to the surface, that are far too regular to be of natural origin. In a submarine, Ella and scientist Konrad Martin dive to the bottom of the trench. The Challenger Depth appears to be the source of ...Seguir leyendo