A Wind in the Door

Meg, Calvin, Mr. Jenkins, and a dragon like creature called a charabin had to journey in to Charles Wallace's mitochondria to help Sporos (a farandolae) deepen. The problem is that Echtroi are trying to convince the farandolae  not to deepen and to kill the deepened farandolae  (or fara).

It all started one night wen Meg, Calvin, and Charles met Blageny and the charabin. The charabin shows Meg that Echtroi are un-naming planets and when they are un-named they become nothing and disappear into thin air.

It is hard to follow with many scientific words but a fun book to try to understand it.