I am currently reading my way through a long list of science fiction and fantasy titles. (http://www.npr.org/2011/08/07/138938145/science-fiction-and-fantasy-finalists if you are interested in the list).
What a charming series! Although MacKenna is undoubtedly the main character, she has plenty of interesting people surrounding her. I'm already looking forward to the 4th book, planned to be published next year.