CASTLE

Castle is an American comedy-drama television series ,which follows a famous mystery novelist
Richard Castle who has killed off his main character in his book series

and has writer's block.
He is called in to help the NYPD solve a copy-cat murder based on one of his novels.
 Castle, who becomes interested in Detective Kate Beckett as a potential character

for a new book series,
uses his connections at the mayor's office and receives permission to continue accompanying Beckett while investigating cases. Castle decides to use Beckett as the model for
the main character of his next book series starring "Nikki Heat".

Beckett, on the other hand  an avid reader of Castle's books,
initially disapproves of having Castle shadow her on her cases,
but later warms up and recognizes Castle as a useful resource in solving crimes.

Go watch the episodes guys they are real on the edge episodes :)