Mortal Engines (The Hungry City Chronicles, #1)

by Philip Reeve

Movement is life. When we have devoured the last wandering city and demolished the last static settlement we will begin digging. We will build great engines, powered by the heat of the earth’s core, and steer our planet from its orbit. We will devour Mars, Venus, and the asteroids. We shall devour the sun itself, and then sail on across the gulf of space. A million years from now our city will still be traveling, no longer hunting towns to eat, but whole new worlds!”