Yes, bundles. There’s GURPS Traveller Essentials, and GURPS Traveller Wars. The first Bundle of Holding includes a book (GURPS Traveller Starports) written by John M. Ford, and that’s worth it all by itself. I still miss the guy.
Anyway, I have the originals in print, and it’s a tight series; you’ll like it. It’s also an alternate of the original timeline, mind you: no assassination of the Emperor, no collapse of civilization, and no New Era stuff. So it might be a little odd-looking to any real grognards perusing it…