This is a really good book. I read it and loved it. I thought it was really well written and it told the story well. It is about a curse that is put on a town beside the Grand Canyon. Animal and human spirits are on a killing spree. It happeneds every forty years. Sam and Dean need to figure out what is really happening and who is doing this, and how to stop it, before a new mall opens.It has some gore in it, which is cool. My favourite part is on page 94 if you have this book. It talks about how their Dad, John Winchester, tries to make them into soldiers, and he succeded in making Dean one. Another thing I like about this book is how they talk about how John trained them to become hunters. It is really detailed and interesting. If you like Supernatural, then you'll love this book.