Of Swords and Parasols

I've only read the Mortal Engines Quartet, and not all of that yet. It begins with a post-apocalyptic steampunkish future London racing across the dried up bed of the old North Sea chasing a smaller town. It's got Traction Cities, Municipal Darwinism, rebel aviatrixes and the inevitable anti-Tractionists, a facially deformed badass heroine out for revenge, an apprentice historian hero who os devoted to the status quo, and all manner of cool bits. I've heard people complain that it's too childish, but I liked it fine, although this was a couple of years ago (I was in my late teens?).