Infernal devices - Philip Reeve

Anchorage has become a static settlement on the shores of the DeadContinent, and its inhabitants have been living peacefully forsixteen years. But now trouble is approaching - in a limpet sub,and fast. The Lost Boys are back, and they'll do anything to getwhat they want. Tom and Hester's daughter Wren is their eager dupe,bored and desperate for adventure. When the theft of the mysteriousTin Book of Anchorage goes wrong, Wren is snatched away inthe limpet, who knows where. Tom and Hester set off to rescue her,but this is the end of their quiet life on Anchorage. The journeywill stir up old needs, old secrets - and send them back intoperilous waters...