I loved that series. Although his Homeworld, Wheelworld and Starworld series was good too. I never was quite able to get into the Eden series.
I enjoyed the Eden series. 'Face, I think you would, too.
We're talking about Harry Harrison, and the books, "West of Eden", "Winter in Eden", and "Return to Eden".
I have them right here, in hardback. They weigh about fourteen pounds.