Best-selling author D.J. MacHale, whose works include the series of novels “Morpheus Road” and “Pendragon,” as well as the Nickelodeon TV series “Are You Afraid of the Dark?” spoke to Harker middle school students via Skype in early May to answer their questions about the writing process and the business of being a published author. Topics discussed included formulating ideas, the decision to become an author and the experience of writing for television and movies.