A Study in Scarlet by Sir Arthur Conan Doyle

Originally published as serialized stories in Beeton's Christmas Annual magazine in 1887, the novel A Study in Scarlet was the first of Doyle's works to feature Sherlock Holmes and Dr. John Watson. One of only four Sherlock Holmes novels, A Study in Scarlet tells the story of how Holmes and Watson met and became roommates.

“The Murders in the Rue Morgue” by Edgar Allan Poe

Widely considered the first modern detective story and a precursor to the Sherlock Holmes series, “The Murders in the Rue Morgue” sets up a prototype for the character of Sherlock with Poe’s very own intellectual investigator, C. Auguste Dupin.

Hound of the Baskervilles by Sir Arthur Conan Doyle

The third of four Holmes and Watson novels, Hound of the Baskervilles began as serialized stories in the early 1900s. After Doyle killed off the character of Sherlock Holmes in "The Final Problem," readers begged for the return of their favorite detective. Hound of the Baskervilles marked Sherlock Holmes’s return.

Murder on the Orient Express by Agatha Christie

Agatha Christie's work is often compared to Doyle's because both writers are considered masters of the detective story. Murder on the Orient Express follows Belgian detective Hercule Poirot as he solves a crime that occurs on his train ride home to London. Christie wrote in her autobiography that she enjoyed and was inspired by Sherlock Holmes stories.