Mr. Dark: How familiar were you with the "Supernatural" world before you decided to write The Unholy Cause?
Joe Schreiber: Not very. I think I watched part of the pilot episode online a few years ago, "The Woman in White". That was it. So when the opportunity to write this novel came along, I put myself through a crash course of scripts, season boxed sets, and episode guides until I had the tone and characters of the series down to my own satisfaction.
MD: This novel clearly takes place during the current season of the show. How much detail about this season's arc did they have to give you in order to ensure its proper place in the canon? How difficult was it to work within that tight framework (what had happened, what had yet to happen) before the season was finished and still tell your story?
JS: It wasn't always easy. At one point, at the beginning of the season, Sam and Dean weren't even together. I was like, how am I supposed to approach this? You're like the child of divorced parents hoping it all works out. They were sending me drafts of scripts that hadn't even been filmed yet, and we were all holding our breath and basically hoping for the best.
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