HarperCollins is proud to present its new range of best-loved, essential classics. 'They all agreed that it was a huge creature, luminous, ghastly and spectral.' Originally serialised in The Strand Magazine, Conan Doyle's The Hound of the Baskervilles follows the infamous Sherlock Holmes and Dr Watson as they investigate the mysterious death of Sir Charles Baskerville, whose dead body is found on the misty and desolate Devon moors. The locals blame his death on the legend of the fearsome phantom hound that they claim has haunted the Baskerville family for generations. When the heir to the Baskerville fortune, Sir Henry, also comes under threat Holmes' detective skills are put to the test as he battles to discover the truth behind the legend and to solve one of the most macabre mysteries of his career.

HarperCollins is proud to present its new range of best-loved, essential classics. Featuring the last 12 stories ever written about the infamous detective, The Case-Book of Sherlock Holmes contains some of Conan Doyle's most villainous and unusual characters. The 1920s was a disenchanting era, and the darker mood of many of these stories reflects the environment at the time. Some even felt that the stories showed Conan Doyle exploring Spiritualism as it was an area he was interested in at the time and the mental derangement and physical disfigurements that crop up in many of the stories allude to the horrors of the First World War. The collection includes 'The Adventure of the Sussex Vampire', 'The Adventure of the Creeping Man' and 'The Adventure of the Lion's Mane'.

The untold story of Sherlock Holmes' greatest rival, Moriarty! Before he was Sherlock's rival, Moriarty fought against the unfair class caste system in London by making sure corrupt nobility got their comeuppance. But even the most well-intentioned plans can spin out of control-will Moriarty's dream of a more just and equal world turn him into a hero...or a monster? In the late 19th century, Great Britain rules over a quarter of the world. Nobles sit in their fancy homes in comfort and luxury, while the working class slaves away at their jobs. When young Albert James Moriarty's upper-class family adopts two lower-class orphans, the cruelty the boys experience at his family's hands cements Albert's hatred of the nobility he was born into. He asks the older of the two boys-who has a genius mind and a killer instinct-to help him rid the world of evil, starting with Albert's own family!

The Valley of Fear, the last of the four Sherlock Holmes novels, ranks among Sir Arthur Conan Doyle's best work. The mystery begins with a coded warning of imminent danger, drawing the illustrious Sherlock Holmes and the faithful Dr. Watson to a secluded English country home. A trail of bewildering clues-raincoats, dumbbells, a missing wedding ring-leads to sleuthing in the finest Holmesian tradition and the gripping backstory of a cult that terrorized a valley in the American West. The Valley of Fear is loosely based on the real-life exploits of the Molly Maguires and Pinkerton agent James McParland. The story was first published in the Strand Magazine between September 1914 and May 1915.