I was pleasantly surprised by this book. I haven’t previously been impressed with Wu’s work, but this book is the best of the Robot City series. The other books suffer from feeling juvenile, whereas this book tells a story without being badly written and boring. Its a shame that you have to wade through the others in the series to get to this one. Interestingly, this book assures me that there another six in the series. They don’t sound like the Robot and Aliens series, as these extra books are meant to more fully explain the origin of Robot City. However, as best as I can tell these additional books were never produced. Wikipedia, Amazon and LibraryThing all have no record of these books existing.