All three of these novels have basis in fact. The authors even give you the actual battles, dates etc so that you can further research the time period if you so desire.
Each novel follows the same family through the harsh settling of the Appalichian mountains. The spiritual undertones are strong but not overbearing to a non- Christian reader. The reality and brutality of the time period is evident in this families heartbreaks -- losing their mother or father or a dear friend. But at the same time the reader can almost feel the euphoria of etching out a life in the wilderness and saying "I did it!"
I truely have enjoyed all 3 of these titles; reading one right after the other. I eagerly await the 4th in the series!