In the future, Hester and Tom own an airship, the Jenny Haniver. Hester and Toms relationship is different then others, they claim to be boyfriend and girlfriend, but they are very different. Hester has a disfigured face and a soldier's toughness, while Tom is a handsome historian who thinks everything must be fair and just. They live in a world where cities move and bigger cities eat littler cities and enslave all of their citizens. Their airship, the Jenny Haniver used to be a famous commanders in the Anti-Traction League before she died in battle. After her death a new division of the Anti- Traction League was formed, the Green Storm, which is a very extreme group. The Green Storm got in an airship chase with Tom and Hester in which they destroy all of the Green Storms airships, but the Jenny Haniver is badly damaged. They must make an emergency landing on the moving city of Anchorage. While repairs are being done Tom becomes attached with the people and the thought of living on a moving city, as he did in his childhood. He then tries to get Hester to stay on Anchorage too, but Hester has other ideas. Soon they are caught up in a plot to save Anchorage, the Jenny Haniver, and their lives.

I thought the beginning of this book was extremely confusing, because there were so many concepts that differed from what we see in our world, an example being the moving cities. For the first few chapters I had no idea of what was happening, the story just starts off with few introductions. I probably would have been less confused at the beginning if I had read the first book, Mortal Engines. I would highly recommend reading it before reading Predators Gold. After I had finished the first few chapters the book got a lot better. Overall it was a good book that would be better if the first book were read before this one.