Mortal Engines (Predator Cities, #1)

by Philip Reeve

He cut through the 21st Century gallery, past the big plastic statues of Pluto and Mickey, animal-headed gods of lost America.

we are experimenting with ways of turning it into a tasty and nutritious snack. We feed our prisoners on nothing else. Unfortunately they keep dying. But that is just a temporary set-back, I’m sure.”