The terrifyingly surreal universe of horror master H. P. Lovecraft bleeds into the logical world of Sherlock Holmes, Sir Arthur Conan Doyle’s champion of rational deduction, in these stories by twenty top horror, mystery, fantasy, and science fiction writers. Arthur Conan Doyle’s Sherlock Holmes is among the most famous literary figures of all time. For more than a hundred years, his adventures have stood as imperishable monuments to the ability of human reason to penetrate every mystery, solve every puzzle, and punish every crime. For nearly as long, the macabre tales of H. P. Lovecraft have haunted readers with their nightmarish glimpses into realms of cosmic chaos and undying evil. But what would happen if Conan Doyle’s peerless detective and his allies were to find themselves faced with mysteries whose solutions lay not only beyond the grasp of logic, but of sanity itself? In this collection of all-new, all-original tales, twenty of today’s most cutting-edge writers provide their answers to that burning question. “A Study in Emerald” by Neil Gaiman: A gruesome murder exposes a plot against the Crown, a seditious conspiracy so cunningly wrought that only one man in all London could have planned it—and only one man can hope to stop it. “A Case of Royal Blood” by Steven-Elliot Altman: Sherlock Holmes and H. G. Wells join forces to protect a princess stalked by a ghost—or perhaps something far worse than a ghost. “Art in the Blood” by Brian Stableford: One man’s horrific affliction leads Sherlock Holmes to an ancient curse that threatens to awaken the crawling chaos slumbering in the blood of all humankind. “The Curious Case of Miss Violet Stone” by Poppy Z. Brite and David Ferguson: A girl who has not eaten in more than three years teaches Holmes and Watson that sometimes the impossible cannot be eliminated. “The Horror of the Many Faces” by Tim Lebbon: Dr. Watson witnesses a maniacal murder in London—and recognizes the villain as none other than his friend, Mr. Sherlock Holmes. With thirteen other dark tales of madness, horror, and deduction, a new and terrible game is afoot: “Tiger! Tiger!” by Elizabeth Bear “The Case of the Wavy Black Dagger” by Steve Perry “The Weeping Masks” by James Lowder “The Adventure of the Antiquarian’s Niece” by Barbara Hambly “The Mystery of the Worm” by John Pelan “The Mystery of the Hanged Man’s Puzzle” by Paul Finch “The Adventure of the Arab’s Manuscript” by Michael Reaves “The Drowned Geologist” by Caitlín R. Kiernan “A Case of Insomnia” by John P. Vourlis “The Adventure of the Voorish Sign” by Richard A. Lupoff “The Adventure of Exham Priory” by F. Gwynplaine MacIntyre “Death Did Not Become Him” by David Niall Wilson and Patricia Lee Macomber “Nightmare in Wax” by Simon Clark

The second novel in Lois H. Gresh's Sherlock Holmes vs. Cthulhu series. Amelia Scarcliffe's monstrous brood, harbingers of Cthulhu, will soon spawn. Her songs spell insanity, death... and illimitable wealth. And Moriarty will do anything to get his hands on gold, even if it means tearing down the walls between this world and a realm of horrors. Meanwhile, after Sherlock Holmes's last tangle with the Order of Dagon, horrifying monsters haunt the Thames, and madness stalks the streets of Whitechapel. Gang war between Moriarty's thugs and the powerful cult can only bring more terror--unless Holmes and Dr. Watson can prevent it. But can they find the cause of the neural psychoses before Watson himself succumbs?

It is the autumn of 1880, and Dr John Watson has just returned from Afghanistan. Badly injured and desperate to forget a nightmarish expedition that left him doubting his sanity, Watson is close to destitution when he meets the extraordinary Sherlock Holmes, who is investigating a series of deaths in the Shadwell district of London. Several bodies have been found, the victims appearing to have starved to death over the course of several weeks, and yet they were reported alive and well mere days before. Moreover, there are disturbing reports of creeping shadows that inspire dread in any who stray too close. Holmes deduces a connection between the deaths and a sinister drug lord who is seeking to expand his criminal empire. Yet both he and Watson are soon forced to accept that there are forces at work far more powerful than they could ever have imagined. Forces that can be summoned, if one is brave – or mad – enough to dare…

The second novel in Lois H. Gresh's Sherlock Holmes vs. Cthulhu series. Amelia Scarcliffe's monstrous brood, harbingers of Cthulhu, will soon spawn. Her songs spell insanity, death... and illimitable wealth. And Moriarty will do anything to get his hands on gold, even if it means tearing down the walls between this world and a realm of horrors. Meanwhile, after Sherlock Holmes's last tangle with the Order of Dagon, horrifying monsters haunt the Thames, and madness stalks the streets of Whitechapel. Gang war between Moriarty's thugs and the powerful cult can only bring more terror--unless Holmes and Dr. Watson can prevent it. But can they find the cause of the neural psychoses before Watson himself succumbs?

The year is 1890. A ship is discovered adrift off the English coast, its crew missing, its murdered captain lashed to the wheel, and its only passenger is a sinister black dog. This impenetrable mystery is clearly a case for the inimitable Sherlock Holmes, but for the first time in his illustrious career the great detective is baffled. Clearly the crew have been murdered and dumped overboard, but what can account for the captain's expression of imponderable terror and his acute loss of blood, or the ship's strange cargo?fifty boxes of earth? The game is afoot, and Sherlock Holmes, aided as ever by the faithful Dr. Watson, finds himself on the trail of no mortal enemy, but the arch-vampire himself?Count Dracula ... From the impalement of the "Bloofer Lady" to the abduction of Watson's beloved wife, Mary, from the death of a harmless prostitute to a terrifying conclusion on a lonely beach, this unique case is at once a glorious celebration of two of the most famous literary genres, a riveting thriller with sensational climaxes, and a tale guaranteed to delight all Holmes and Dracula lovers everywhere.

Following his encounter with the vampire Selymes, Sherlock Holmes embarks on an Arctic expedition under the assumed name of Thomas Sigerson. During his excursion, the great detective uncovers strange and dark forces at work, and only learns that some mysteries are best left unsolved! Sir Arthur Conan-Doyle meets H. P. Lovecraft!