Gerard K. O'Neill's most popular book is The High Frontier: Human Colonies In Space with 12 saves and an average rating of 3.67.
Series
9 primary booksAuthored 11% of series
Apogee Books Space Series is a 9-book series with 9 released primary works first released in 1977 with contributions by Gerard K. O'Neill, Sy Liebergot, and David M. Harland.