This question already has an answer here:

I'm looking for a book series in which a girl meets aliens. She was the only person on Earth to have met aliens.

One of them was an intelligent purple ball that I think could morph into other shapes, but I could be wrong. She helped them (possibly by fighting aliens or something) and when she was sent to some sort of alien training academy they made her a robot to temporarily take her place on Earth.

marked as duplicate by FuzzyBoots story-identification Jun 29 '17 at 18:28

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.


It's the Akiko series, with the storyline you're discussing coming specifically from Akiko and the Journey to Toog.

It's a comic series, but Wikipedia says this was one of the comics adapted to a children's book. It has a purple ball alien, Poog, with the eponymous planet of Toog being were Poog comes from, and one of the plot points is that Akiko needs to get home before her robotic duplicate is discovered.

Not the answer you're looking for? Browse other questions tagged or ask your own question.