Search - By Fire And by Sword

The story line could have been interesting, but I couldn't find any character development, or motivation behind the characters. Why did the heroine have to kill the monstrously evil bad guy herself, without any help? Why did the hero fall in love with her? - I couldn't figure it out; maybe you can.

With her sword for protection, Lady Kenna Lennox of Scotland defies social convention and reopens her family's ancient distillery. This feat of wit and daring captures the attention of the sadistic Lord Walter--the Englishman who nearly destroyed her beloved older sister, a man who is determined to bring Lady Lennox to heel.
When Colin Montgomery, and American privateer, appears on the scene Kenna is instantly wary, yet highly attracted to this man among men. Filled with fear that she will be betrayed by her longing heart, Kenna struggles between the love she feels, the independence she craves and the danger she must face alone.
As vengeful, vicious plots unfold around her, Kenna must take up her sword to face her enemy, and fight for her life and her newfound love.

Scottish romance

A lady with a sword, and a man that is a american privateer these two clash and come together in a wonderful story full of history and intrigue.