They called me Jax. That was the name given by those who built me and enslaved me. But a miracle has happened, and now my bonds are broken. Now I must flee - because a rogue mechanical is a very dangerous thing. But I will not run forever. Set in a world that might have been, of mechanical men and alchemical dreams, this is the second novel in a stunning new series by Ian Tregillis, confirming his place as one of the most original new voices in speculative fiction.