I am bringing out a new Yamabuki book in the next few weeks called Cold Rain, or Reiu冷雨in Japanese, but you don't have read or understand Japanese to enjoy this book. This book was created when the original Book 2 Cold Heart became too large to comfortably fit into the series, so the 6 book series is now 7. Cold Heart will still appear and pretty much on the heels of Cold Rain.
Cold Rain brings other major characters of Yamabuki's life onto the stage as she heads toward Heain-kyo. These actors include Yamabuki's parents, daimyo Taka and Lady Taka, herself an accomplished swordswoman; Yamabuki's beloved handmaids Tomo-ko and Hana-ye; Yamabuki's teacher of languages, science of the day, and martial arts, Lord Nakagawa; and Yamabuki's "Javert," the fallen priest turned assassin, Saburo, who has sworn to kill Yamabuki now that he learns that she has killed his mentor and master.