Lovecraft created all of the lore legend , history of Cthulhu including the dreaded Necronomicon He also drew inspiration from a host of other writers like Algenon Blackwood, William Hops Hodgson , Abram Merritt. Lenard Cline, Guy De Maupassant , Edgar Allen Poe, Lord Dunany, Arthur Conan Doyle and lot of others beyond that , August Derleth , wrote lovecraftain tales that were derivative of Lovecraft's work, he expanded Lovecraft's story fragment The Lurker at the Threshold , Into a full novel That said , Dereleth was in own right a pretty good writer of macabre tales. He also gave us the Sherlock Holmes pastiche stories of Solar Pons.