Predator's Gold, the second book in the Mortal Engines Quartet series, is a young-adult science fiction fantasy novel written by Philip Reeve and published in 2003. In the book, Tom and Hester stumble across the ice raft of Anchorage. Synopsis Setting Predator's Gold is set two years after Mortal Engines. In that time, lovers Tom Natsworthy and Hester Shaw have been using the Jenny Haniver, their deceased comrade Anna Fang's airship, to travel across the world trading and adventuring. Plot summary Tom and Hester meet adventurer and author Nimrod Pennyroyal aboard the Airhaven, a former Traction City that converted to a floating city. Pennyroyal persuades them to take him as a passenger. They are soon pursued by airships of the Green Storm, a fanatical splinter group of the Anti-Traction League, who want the Jenny Haniver as they believe it was stolen from their deceased leader and friend to Tom and Hester, Anna Fang. Despite evading the airships, the Jenny Haniver is damaged and drifts helplessly over the Ice Wastes. They are rescued by Anchorage, which was once a thriving Traction City that relied primarily upon trade, but had recently been devastated by an excavated biological weapon that killed most of the inhabitants. The survivors have set a course for North America, which is believed to be a radioactive wasteland since the Sixty Minute War. The city is ruled by the young margravine Freya Rasmussen, who treats all three of them as honoured guests and appoints Pennyroyal as the city's chief navigator because of his past experiences (detailed in his book America the Beautiful) traveling in America. As Anchorage's harbormaster works to repair the Jenny Haniver, Hester becomes jealous of Tom's growing closeness to Freya, and is also disturbed by the sightings of "ghosts" in the city. Eventually she sees Tom kissing Freya, and flies away from the city in the Jenny Haniver. Thereafter, Hester sells Anchorage's course to Piotr Masgard, the leader of the "Huntsmen" of the Traction City of Arkangel, who intends to capture the city through an airship invasion; rather than accepting money as payment for this information, she insists that when Arkangel eats Anchorage, Tom be returned to her. As she returns to the Jenny Haniver, however, she is drugged and kidnapped by a Green Storm informant. Hester is taken to Rogue's Roost, an island south of Greenland, where the Green Storm have converted Anna Fang's body