Yes, Serpico was based on a true story. It was inspired by the real-life experiences of Frank Serpico, a New York City police officer who exposed corruption within the police force.
The book Serpico is indeed non-fiction. It tells the true story of Frank Serpico's experiences within the police force and his fight against corruption.
The name 'serpico king story' is rather ambiguous. It could potentially be about a person named Serpico who has some sort of king - like status or a story where a king has an encounter with something related to 'serpico'. If it's a fictional story, it might involve elements of adventure, like the Serpico character going on a quest in a king - dom, facing challenges and making decisions that shape the story. But again, without more details, this is all speculation.
There could also be a victim - turned - avenger type of character in 'serpico crime fiction'. Maybe someone who was wronged by the criminals and then decides to take matters into their own hands, and this character's journey becomes a central part of the story.
As I don't know the exact 'serpico king story', it's hard to say. But generally, it might have characters like Serpico and the king as main elements. There could also be a setting, perhaps a castle or a kingdom. And a plot which might involve conflict between Serpico and the king or something they are both involved in.