Laurie R. King has written successful police novels about San Francisco cop Kate Martinelli and a couple of one-offs where the emphasis is on psychological suspense. To many readers, however, her most consistently enjoyable work is to be found in the four books featuring Sherlock Holmes and his wife (shock horror!) Mary Russell. Fittingly, the centenary of the publication of 'The Hound of the Baskervilles' sees the appearance in the UK of a novel which first came out in the States a couple of years ago, in which Holmes, accompanied by Mary, returns to Dartmoor. The atmospheric setting is beautifully evoked and the story, although to my mind over-long, is entertaining enough. Provided that one accepts the basic premise, this is Sherlockian near-pastiche done to a high level of accomplishment.