Melissa Rosenberg, one of the screenwriters behind Twilight, has spoken out about the challenges of adapting a best-selling novel into a blockbuster movie.

The executive producer on Dexter told TV Guide she tried to adapt the novel, rather than using it as a "jumping off point."

"We knew that if we were true to the book, if we honored it, fans would come with us," she said.

Rosenfeld saw a significant numbers of parallels between writing Twilight and writing for Showtime's Dexter, which chronicles the double-life of a serial killer.

"In both cases there is, at the center, a character who is not human, and seeks to be human," she said. "He passes as human, and is fascinated by humanity. What you get with characters like that is their exploration of what it is to be human, so it's a wonderful exploration, storytelling-wise, of that question exactly, and all the subtleties of it.

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The grandest scope of love and commitment and the smaller things, like physical warmth, that appeals to me. That's what storytellng is at its heart, the exploration of the human condition."