FInn by Jon Clinch
Clinch uses references from Twain's book to weave the story of Finn (Huckleberry Finn's father). Finn is a dark and seedy character haunted by demons both past and present, tormented by his own father's idealism and hatred for him and his alcoholism that he has inherited from his grandfather. A brute and a drunkard, Finn is a sinister man who has a forbidden relationship with Mary, a former slave, who is unable to escape the brutal power Finn has over her. I found this book to be a very good book and I highly recommend it.