Northamptonshire is a county in England. Perhaps you are thinking of an author who was from Northamptonshire or who wrote about the county?
To help me find what you are looking for, could you tell me:
* Are you thinking of a specific book or work?
* Do you know anything about the author (e.g., time period, genre)?
* Is there a specific topic or theme you are interested in?
With more information, I can assist you in finding the author you are looking for.