If you go to Wikipedia and type in Sackett for the search, you will find a page with a list of Sackett Stories by L'Amour. That list is what I think it would look like if you combined all of the Sackett stories including those with Sackett references or cameos with the Talon and Chantry stories interwoven into a single chronology. Others may disagree with its arrangement.

I read something by some guy once where he referred to all of this as the Sackett Saga. We will probably never know why LL dropped Sacketts into some of these stories. Maybe it was just LL's way of creating a larger tale of the American frontier where a family named Sackett and their kin roamed, explored, and helped to build a nation. And, if you add teacher to all of the things that LL was, it might just be he wanted to create a fictional series based on American history that he hoped might inspire readers to further explore American history in more depth on their own. Who knows? One thing we do know is that he was a master artist and created something that is really interesting and fun to read and explore.