Kym: Hi Catherine, welcome to the Cozy Corner!   Kym Roberts: The opening line to a novel is so important, especially when it’s for a new series. Authors frequently struggle to welcome readers into their world with a scene that grabs them by the collar. You, however, went for the clerical collar with, “Bless me, Father, for I have sinned. I want to commit a homicide.” It was the perfect intro to your debut in The Vacation Mysteries, EVERY TIME I GO ON VACATION, SOMEONE DIES. Did the chapter come to you before that line, or did the line formulate the chapter? Catherine Mack: The line came to me first. The book always opened on some version of that line. That’s usually how it works for me—I think of the character, and they come alive to me with an opening line.   Kym: How did you come up with the title because I honestly think some of us have experienced that sense of doom when we pack our suitcases? Catherine: Haha. I was in Italy with my husband, and I was riffing on Agatha Christie books and Miss Marple and why anyone would invite her on vacation when every time…