Jeff Shaara has continued to write a number of sequels that his father,
Michael Shaara, started.
One of his father's Civil War novels, "
The Killer Angels," won the Pulitzer Prize for Fiction.
If you haven't read that one, then I would read that first.
(If you're already familiar with all this, then please ignore.)
Here's some more information about Jeff and Michael Shaara:
http://www.jeffshaara.com/michael_shaara.asp
Don