I agree with Matthew that it doesn't need to be a commercial production, with loads of books run out and sent by plane and truck to book stores.

Another series of tests fitted a "sensing seat" to a truck to record each driver's characteristic seated posture in an attempt to spot whether commercial vehicles had been hijacked.

Terrafugia, a company which has already pioneered a flying car for commercial use, has been drafted in to help produce a prototype armoured truck.