This is one of the novels where e-rights reverted to me and not to Penguin. To my enormous delight, I get to use them myself.
As with HELL SCREEN (same situation), I had to provide my own cover design. I usually scour Japanese art for something useful and time-appropriate, in this case a print by Yoshitoshi. The novel is probably the most romantic of all of them (which may account for the fact that it garners slightly more sales than the others) and involves wisteria blossoms. I love trying to find fitting images. Most of the professionally designed covers I have seen were done by artists who hadn't read the books.
The books I'm taking directly to Kindle sell for 4.99, unlike the Penguin-owned ones (12.99). I hope that will spur sales. Perhaps it may also bring me more readers.