Also, 'Brilliance of the Moon' is worth reading. It further develops the story and the characters, especially in terms of their growth and the challenges they face. The world - building in this one is also expanded upon, making it an exciting addition to Lian Hearn's body of work.
Another one is 'Grass for His Pillow'. It continues the story from 'Across the Nightingale Floor' and delves deeper into the characters' relationships and the political intrigue of the world. It's full of twists and turns that keep you hooked.
Definitely. 'Across the Nightingale Floor' is a great start. It's the first book in the Tales of the Otori series. It sets up the story's world and characters really well, with a captivating plot full of intrigue and action.