Plot hole: At the end of the book you are told that Artemis' father cannot remember anything that happened after he left on the fowl star. Yet in the third book, during one of Artemis's diary extracts he talks about when he was a prisoner - how does he remember that?
Factual error: In the end of chapter 7, Foaly provides Butler with a moonbelt. From its name and what the book tells us, the moonbelt will reduce the weight of its attachments to the same ratio as the Earth's gravity to the moon's gravity. That means the moonbelt should reduce the weight of its attachments to one sixth of the Earth norm, but in the book it states that it only reduces to one fifth of the Earth norm.
