For the Mystery and Detective Fiction:
* Agatha Christie: The undisputed queen of mystery, known for her intricate plots, memorable characters like Hercule Poirot and Miss Marple, and surprising twists.
* G.K. Chesterton: Creator of the brilliant detective Father Brown, known for his blend of Catholic faith and clever deductions.
* Dorothy L. Sayers: Author of the Lord Peter Wimsey series, featuring a gentleman detective with a sharp intellect and a love of the finer things in life.
* Wilkie Collins: Considered one of the founders of the detective novel, with works like "The Woman in White" that showcase his gripping suspense and intricate plots.
* Edgar Allan Poe: Though known primarily for his horror, Poe was also a pioneer in the detective story genre, creating the famous detective C. Auguste Dupin.
For the Supernatural and Horror:
* Bram Stoker: Author of the iconic "Dracula," known for its gothic atmosphere and exploration of the dark side of human nature.
* H.P. Lovecraft: Master of cosmic horror, his works delve into the terrifying and incomprehensible nature of the universe.
* M.R. James: A prolific writer of ghost stories known for their chilling atmosphere and psychological horror.
* Algernon Blackwood: Known for his eerie and atmospheric tales of the supernatural, often exploring themes of the unknown and the uncanny.
For Historical Fiction:
* Ken Follett: Author of sweeping historical novels that blend historical detail with captivating narratives.
* Colleen McCullough: Known for her epic historical novels, such as "The Thorn Birds," set in the Australian outback and exploring themes of love, faith, and family.
* Simon Scarrow: Author of the acclaimed "Eagles of the Empire" series, focusing on Roman legionaries and their battles.
For Adventure and Science Fiction:
* Jules Verne: A master of science fiction, known for his adventurous tales of travel and exploration.
* H.G. Wells: A visionary science fiction writer, known for his imaginative stories about time travel and alien encounters.
* Robert Louis Stevenson: Author of "Treasure Island" and "Kidnapped," classics of adventure fiction that transport readers to exotic settings.
Beyond these suggestions, consider exploring other authors from the same era as Conan Doyle (the late 19th and early 20th centuries), or authors who have been influenced by his work.
Ultimately, the best way to find authors similar to Conan Doyle is to discover what aspects of his work resonate most with you and explore other authors writing in those same genres or themes.