I can recommend Gerard O'Neill's The High Frontier. https://www.scribd.com/doc/239652061/The-High-Frontier-Human-Coloni-Gerard-O-Neill https://www.scribd.com/do

I can recommend Gerard O'Neill's The High Frontier. https://www.scribd.com/doc/239652061/The-High-Frontier-Human-Coloni-Gerard-O-Neill https://www.scribd.com/doc/239652061/The-High-Frontier-Human... Thanks for the recommendation for The Millenium Project, jasonpeacock, I'll check it out. :-)