Anyone read that? A bit unusual but if you like stories about vampires AND you like paddlesteamers I can't recommend it highly enough. It's similar in a way, to 'Interview with the Vampire' (also takes place around the Mississippi) but with most of the action on a riverboat. I'm guessing the author knows what he's talking (writing) about or had researched the subject very well as the descriptions of what goes on aboard the steamer are so graphic (the best part I thought, was when the captain gets into a race with another large sidewheeler!)
http://www.amazon.com/exec/obidos/tg/detail/-/0553383051/104-1138128-6436765?v=glance