I'm looking for a book I read a few years ago, and I can't remember the name of it. It's about a person who works on a farm for money and suspects someone of being a vampire, but when they try to tell people, no one believes them. Eventually this person gets turned into a vampire, and at the end of the book, they are found by some kids when they are sleeping in their coffin inside of a large house. The kids alert the town's people and they set fire to the house. I think this book was in flashback form and the flashback was from a long time ago, but the vampire is telling the story in more modern times. Can anyone help me find it?