Right at the start, this is a swashbuckling book. It is set up during the 18th century, with a strange parallel reality fantasy-land forming a background for the story.
This book got me interested because of the characters, a small military company of losers and lunatics. These guys are funny to follow around, struggling in a situation they want nothing to do with.
My only complaint is that I think it would have been more successful as a story if the actual journey started much sooner than it did.
I give it 5 stars because I was never bored reading it, indeed it makes for a very exciting, quick read. You won't be disapointed.