The Gil the A.R.M. story cycle to be specific, although there are echos of it in most of Niven's other universes. Well worth a read (as are all the Known Space stories), if you can find any of it. I think it has been out of print for a while.
I’m remembering a book where people convicted of various crimes were sent to live on an island prison where their organs were harvested over time as needed. Can you guys remember it?
I remember Niven's A Gift From Earth
A probe from earth delivered organ cloning technology to colonists at Tau Ceti. It caused a revolt and overthrow of the tyrannical organ harvesting government there.