Chapters 19 and 20 Summary

In Chapter 19, Ax showed the kids around the dome. Jake recognizes that the dome is a part of another world and being there is like being on another planet. Ax warns that the Yeerks would make his planet and Earth as barren as their own if they get the chance. Ax explains that once a planet is under their control, the Yeerks change it to suit their needs and only allow enough plants and animals to remain to keep the host bodies fed. They eliminate eliminate all the species except those that they plan to eat. Yeerks are killers of worlds - murderers of all life. They leave only desolation and misery in their wake.

Most species have succumbed to them. Only the Andalites can defeat them. But the Andalite warriors will not return to earth for a year or two...