Around the time I went to Rome in June 2017, shortly after publishing Samurai Assassins, I had decided that I would not write anymore about this history because the research was too demanding. But the Colosseum changed my mind. The next month, shortly after returning home, I started a book about the Shinsengumi. I’m almost finished.
[For updates about the publication of my next book on the Shinsengumi (title and publisher to be determined), follow me on my Amazon author’s page: amazon.com/author/romulus .]