Ascent of Terra

This is the 4th and final volume of the Terra Cyclus. Earh ascents. The Sarans appear and the Guardian reveals itself.

The 200 Immortal Guides are chosen

 Terra Cycle 

Children of Terra                                                                 (Volume 1 GCBook 4)

Agents of Terra                                                                      (Volume 2 GC Book 5)

Killers of Terra                                                                         ( Volume 3 GC Book 6)

Ascent of Terra                                                                        (Volume 4 GC Book 7)