Can you recommend some novels about undercover agents, spies, and liars?

The male lead was an undercover agent, spy, or swindler, pretending to be someone else or infiltrating the target organization.
Ancient times, modern times, even if it's just an empty space.
I mean, like in web novels
not a movie

Answer 1

I recommend the following novel to you. I hope you will like it ~
1. "Conan: I'm Surrounded by Undercovers": It was a story about an undercover police officer and an FBI agent working together. It was a story full of tension and excitement.
2. "You call this undercover? The story told the story of a man who appeared to be a spy but was actually a fool and a real spy. It was very humorous and interesting.
3. [Step by Step as a Phoenix]: The female protagonist who faces a life-and-death crisis after traveling to ancient times is the undercover of undercover agents, and the plot is full of twists and turns.
4. [Star Spy Family: It tells the story of a family of spies who have been spies for generations. There are many exciting scenes of open and secret struggles.]

I hope you like my recommendation. Muah ~