In "A Darkling Plain", Philip Reeve brilliantly completes the breath-taking adventures that began with "Mortal Engines".

Wren Natsworthy is enjoying life as an aviatrix but her father Tom is troubled by matters of the heart - the last, shocking, encounter with Hester, and the old wound caused by Pennyroyal's bullet.

Meanwhile the fragile truce between the Green Storm and the Traction Cities splinters and hostility breaks out again.

Events are set on a collision course as things end where they began, with London...