Hello, Elle,
The characters stay the same, but more enter the tale, Potato Brumbaugh, for instance, another very strong character.
Also, their children, and grandchildren.
There are no other US editors that I can think of.
He spins his tales the same way though, and in every book the research is mighty impressive.
Your next book?
Well, Chesapeake is good.
Starts in the 16th Century, has strong women characters.
Two, I remember are, Rosalind Janney, (she hangs a pirate captain) and Ruth Brinton, a Quaker, who suffered for her religion..
Also in Chesapeake, there is Onk Or, a Canada goose, another strong character, who I liked.
Lots of religion, slavery, ship building, etc in it.
If you like Centennial you should take to Chesapeake.
Or Alaska, a favourite of mine.
Poland is excellent, and of course, his books on the Pacific.
Have a look on Amazon or Goodreads and see what you think.
I will have read them, so could offer an opinion, too.