Worldshaker - Richard Harland This is a story about a boy named Colbert who's family is at the top of the upper elite. His grandfather is the Supreme Commander of The Worldshaker which is a juggernaut (a gigantic machine that travels over land, sea and air). The juggernaut is fueled by coal and the coal is put into the boilers by these things called Filthies. There thought to be less then human, until one day Col meets a filthy girl named Riff and finds out that the Filthies are humans just like himself. And so starts the filthies fight for equality.

I enjoyed this book a lot it was a little slow to start but after about 100 pages it picked right up.