Years ago now, I wondered whether Larry Niven had written anything more about the Ringworld. Before leaving work on a Friday afternoon, I Googled "Larry Niven Ringworld" and discovered the then new title, Ringworld's Children. I located a copy of this book in the sf section of the Public Library the following day.
I had thought that we would be having holidays on the Moon by now but we have fulfilled the sf prediction of a worldwide computer linkage and hand-held access to all recorded knowledge.
Is Niven's Known Space bigger than Anderson's Technic History? Not in my opinion.