Touchstone, January 2017Different Class, by Joanne Harris It’s “Goodbye, Mr. Chips” meets “The Bad Seed.” Joanne Harris’ latest novel, “Different Class,” has a killer elevator pitch and, what’s more, it delivers on its intriguing premise. Harris is a British writer who is perhaps best known to American audiences for her novel “Chocolat,” which was made into a film starring Johnny Depp and Juliette Binoche.