"The Daybreakers" by Louis L'Amour

Wow.  I mean, wow.
When L'Amour sets out to write a serious book, he writes a really serious book.  What these boys go through in this story -- it's no picnic.
Tyrel Sackett saves his brother Orrin from getting shot on his wedding day.  Orrin's bride-to-be takes the bullet instead, all part of the Sacketts' feud with the Higginses.  Tye downs her murderer, the last of the Higgins clan, then flees Tennessee for the West.  Orrin comes along because, well, his bride was just killed at the altar and h...