This story is so far the most exciting for me. But at the same time, I was really starting to wonder why Gilbert wasn't more concerned about home and his parents. Thankfully, my concerns were sort-of addressed. Yeah, I said sort-of. Essentially, at one point, there was even more concern, but you won't understand what I'm talking about without reading the story.
I learned more about Aoléon and her people in this part. It was nice to get a real sense of their history as Martians, and life on Mars.
This story has you hanging off the edge-of-your-seat dangling on the edge-of-a-cliff at the end though. Be prepared to start part 5 immediately!