Putting new wine into old wineskins is an increasingly popular fictional mode. Retellings of 19th-century novels abound. Jane Austen inevitably leads the way, with Val McDermid’s Northanger Abbey, Alexander McCall Smith’s Emma, Joanna Trollope’s Sense and Sensibility, and no fewer than four recent adaptations of Pride and Prejudice. Dickens, too, has been updated, with Michael Rosen’s Bah Humbug and Lorie Langdon’s Olivia Twist.