The Book of Time
The teenagers have been contacted by an unknown Cheberian living in Peru. He is a member of a scientific team who came to Earth before the disappearance of Cheberith to study the Nasca designs that were also to be found on their home planet. A few years before, they had worked with Larchael, the Cheberian responsible for hiding the last Book, who turns out to be… Lea’s father.
So they leave for Peru to find the third Book of Worlds and, helped by other Cheberians, they manage to enter the vortex leading to the location of the planet Cheberith in order that it may be recreated. This is where the Ingurgitator of Worlds joins them for his final attack. Luckily, the saviours of the vanished world have planned everything, but not, however, without huge sacrifice and loss.