I read a book about 15 years ago and I don't remember hardly any of the details at all. What I do remember of the plot is that a white man pays a black man a hefty sum of money in order to keep him caged in his basement for a specified amount of time (a month? a year?). Possibly motivated by some combination of white guilt or a personal fetish.
I think the cover may have been a picture of some aspect of a house in black and white.
I wish I had more details. I haven't had any leads Googling this stuff either.