Joe Schreiber 
The Unholy Cause [EPUB ebook] 

A Supernatural novel that reveals a previously unseen adventure for the Winchester brothers, from the hit TV series! Twenty-seven years ago, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. In the years after, their father, John, taught them about the paranormal evil that lives in the dark corners and on the back roads of America…and he taught them how to kill it. Way back in April 1862, Confederate Captain Jubal Beauchamp leads a charge across a Georgia battleground… Fast forward to 2009 and a civil war re-enactment becomes all too real. When Sam and Dean head down south to investigate they find that history has got somewhat out of hand…