Sometimes, the middle ground is a good place to be. The Shifting Fog is classy commercial fiction that sits happily in the space between literary fiction and mass-market trash. It might occupy the middle ground, but it’s far from middle of the road. First-time author Kate Morton (recipient of the six-figure sums for deals in eleven countries that publisher Allen & Unwin is happily hyping) has skilfully and intelligently created a novel that is indeed, as the publicity has it, ‘compulsively readable’.