I bought this book a while ago, and have been hesitant to start it because I just couldn't figure out what the story was going to be -- and it is a big book.
Boy am I glad I finally cracked the cover. I was hooked on the first page (the very first page!) because of a sentence describing the lack of gold in the gold rush that said "...and truth travels slowly when rumors have wings of gold."
From then on I just fell into the wonderful writing and story-telling and let the strange tale of a walled Seattle, filled with deadly yellow blight and rotters, take me away.
If I could I think I would give this a 4.5. That last half point is taken off for just something that felt like it was missing from the story. It might have been the lack of a real antagonist, or the fact that I couldn't quite figure out the two main characters, or the mysterious rotters that were never quite explained, but it only detracted slightly from a great novel.
It looks like I am already two books behind in the Clockwork Century series, and I certainly won't hesitate to start the next one!