If you love Christmas movies, as in you check the Hallmark Channel guide starting in July, then hang on to your stockings, because here comes the merriest of indulgences in print. It's "The Proposal" meets "The Holiday". First meet Robyn Lane. She's always dated struggling creative types, including her current squeeze (Perry, an actor). For this year's Chrismukkah celebration, her parents would love her to bring someone stable, reliable,...