The Science Fiction Gods must have been smiling on the day of China Mieville's birth. This top-notch author of King Rat, Un Lun Dun, Perdido Street Station, The City & The City, Kraken, & Embassytown sets yet another star in the SF heavens. Railsea is offered as a juvenile book, but the only thing that to my eye requires a younger reader is the premise of the world in which this story takes place. It is extreme in its stretching of our willing suspension of disbelief. It is as far as Michael Moorcock or Cordwainer Smith ever stretched it, but without removing the humanness of the tale. I recommend it to everyone who enjoys a good yarn.