The sequel to Mortal Engines and Predator’s Gold. Anchorage is no more. The brave ice city that rescued Tom and Hester so long ago is now a static settlement -Anchorage-in-Vineland, a sleepy hidden secret, full of people who have forgotten hard times and children who never knew them. Bored children, like Wren Natsworthy, their daughter.  Wren is fifteen and thinks she wants excitement.  When the Lost Boys turn up on the beach looking for the Tin Book, Wren’s sure this is her adventure.  But trusting the Lost Boys is a dangerous start to any adventure and before the day is over Wren finds herself a captive, then a slave, and then the bait that leads Tom and Hester back into perilous waters.