Don't look for reading material because it's gonna fry your brain. It is one of these things that you really shouldn't even attempt to read any of the horrible drivel people publish. It's a social activity so it is best learned socially. "Flirting" isn't even a separate skill really, it's the same skills as other social interactions.

Also for me it's kinda worked to say stuff that is slightly weird but also somewhat interesting to tilt people.