Double Sided**

Traveling Through the Republic of China, Espionage, Multiple Identities, Male Protagonist, Same Party

I want to read a book similar to "Across the Republic of China: The Spy Enters the World". This book is really good to read, but unfortunately it is a serial. I finished it very quickly. I want to read something similar. I really like the characters of the male and female protagonists! Asking for books!