I found The Seven Markets very disappointing. It is a brilliant idea - there is a magical market that appears approximately once a century and is completely wonderful, full of lots of exciting things. In the 18th century a girl goes to the market with her sweetheart and is enchanted by a fairy prince and stolen away. The story is then told in the events of the following six markets. So far, so interesting. The problem, however, is that the story is confusingly written and the characters aren't very interesting, so it was difficult for me to stick with the story beyond the first market - it was hard to follow and I just didn't care enough.
I didn't actually read large chunks of the book, as I was skimming through to see if it improved, and I don't think it did. Not a lot else to say really. Good idea, poorly done.