Actually I wasn't sure if this fell under Alternative History or Historical so I went ahead and put that here. For some of us who enjoy history or historical novels and for those of us especially enamoured with Japan, this is an interesting novel in which the heroine who's father was forced to commit seppuku, begins the long road of vengance to restore his honor. It's a really intersting novel, honestly. It's been a long while since I've read it, so I'll have to go back and re-read but I remember really liking it a lot. The author is Lucia St. Claire Robson, however I think it might be out of print now so if you're interested in getting it you might have to search your library or a used bookstore or on-line.