The Moor is the fourth book in Mary Russell series by Laurie R. King. Mary Russell and Sherlock Holmes investigate strange goings-on on Dartmoor. Reprising the setting and some of the plotlines of The Hound of the Baskervilles, Holmes and Russell come to the aid of the Reverend Sabine Baring-Gould. For an excerpt of the first chapter, go to Laurie R. King's website.