I would be very appreciative of someone knew the name of this book. In the book, girls have been forbidden to become samurai (or at least it was something like samurai) for about 500 years. There is a girl who I believe was orphaned and went under cover as a boy to learn the art. To pass a test they had to be chosen by a dragon spirit. She was chosen by a dragon spirit that had believed to have disappeared for 500 years. The girl tries to hide her femininity from the dragon spirit. Later on it was revealed that the girl was chosen because the dragon only chose women and she becomes a fairly strong warrior. I have read this book but I have no idea at all were I left it or what it was called. If anyone can help me out, thank you.