Sigh. OK. My dad was a huge western fan, and I basically grew up reading his books. I inherited my dad's collection obviously, and if I don't own every book the man ever wrote, it's damn close. (He was sorta a latter-day Jack London, pretty interesting story actually.)
So, The Daybreakers is actually one of a series of books, (the 6th it appears), which follows the Sackett family all the way from 1599 to 1906.
Almost all of his books, and there are a lot, are pretty good. Straightforward, uncomplicated, good old fashioned story-telling.
I strongly recommend:
The Lonesome Gods
The Walking Drum
The Last of the Breed
None of those are typical of his usual fair, but they are definitely among his best. He also has some poetry, and some auto-biographical books.
I referenced the opening paragraphs of one of his books here as one of my most memorable ever.
--A