Twenty Years Behind Enemy Lines

A Novel About Transmigrating to Republican-Era China and Becoming a Bandit

Looking for Spy Novels About Infiltrating Japan's Tokko Unit

Any Novels About Li Yunlong That Continue Into the Post-Founding Era?

Are There Any Stories About Fengtian Warlords?

Any Books About the Beiyang Warlords?

Looking for books like "Republican-Era Warlord: My Left Hand Holds the Realm, My Right Hand Holds Beauty." Recommend a few stories about the Beiyang warlords. I've reread "The Great Warlord of the Xinhai Revolution" so many times I'm getting tired of it. Are there any written in a more recent style?