Raising Steam by Terry Pratchett

Raising Steam : Paperback : Transworld Publishers Ltd : 9780552170529 : 0552170526 : 20 Nov 2014 : To the consternation of the patrician, Lord Vetinari, a new invention has arrived in Ankh-Morpork - a great clanging monster of a machine that harnesses the power of all of the elements: earth, air, fire and water.