[dredmorbius]

Gerard K. O'Neill, High Fronteir and T.A. Heppenheimer, Colonies in Space were two of the better-known ones. Both have distinctive covers.

https://www.worldcat.org/title/high-frontier-human-colonies-...

https://www.worldcat.org/title/colonies-in-space-a-comprehen...

[abecedarius]

online copy of the latter: https://space.nss.org/colonies-in-space-by-t-a-heppenheimer/

[dredmorbius]

O'Neill's book is at the Internet Archive / Open Library, available for check-out.