In addition to Freeper authors, I also liked:
The entire "Narrative of America" series by Alan EckertOutside of the Sci-Fi, "Empire East", there's lots and lots of good all American reading there that is true to the historical foundations of our nation and liberty.Thom's work in "From Sea to Shining Sea" and "Panther in the Sky", as well as "Long Knife"
Tyone Martin's, "A Most Fortunate Ship" about the USS Constitution.
Saberhagans "Empire East"
...and would recommend highly the "Prelude to Glory Series" by Carter about the Revolutionary War period.