Ooo, somebody's republished D.F. Jones' Colossus (AKA The Forbin Project). Oddly, though, they've put out second sequel but not the first.

Thanks for the pointer; I'll go snatch up Colossus and The Fall of Colossus as ebooks.

It's been years since I've read them but isn't Fall the second book, and thus the first sequel, in the series?

(Edited for formatting)