The Sherlock Holmes Triple Feature - A Study in Scarlet, The Sign of Four, and The Hound of the Baskervilles

To a great mind, nothing is little.
The First Three Sherlock Holmes Novels in One Book
A Study in Scarlet: After returning from the Second Anglo-Afghan War, Dr. John. H. Watson begins to seek out someone to share a living space with. It is then and there that he is introduced to a one Mr. Sherlock Holmes, and thus begins the famous relationship between the master detective and the good doctor. Upon hearing of a murder committed in an abandoned house, Dr. Watson convinces the reluctant Sherlock to investigate. With his trusty magnifying glass and a tape measure, Sherlock and his partner Dr. Watson embark together on the first of their many investigations.
The Sign of Four: The greatest detective duo is back and they have taken a case from Mary Morstan, whose father has gone missing ten years earlier after he had returned from India. The case isn't as simple as a missing person, however. Starting six years ago, Mary had begun to receive a single pearl every year, and with the last pearl, a request for a meeting was attached to the gift. Coincidentally, it seems Mary's father had a friend from his regiment named Major Sholto who had died at near the same time Mary began receiving her annual pearl. Together, Holmes, Watson, and Mary set off to meet the anonymous sender of the pearls, and thus begins the second mystery in the Sherlock literary canon.
The Hound of the Baskervilles: In the moors of Devon, Sir Charles Baskerville is found dead of an apparent heart attack. But with a horror-stricken look frozen on his face and fresh footprints of none other than a legendary giant dog found nearby, Dr. James Mortimer believes misconduct played a role in his friend's untimely death and Mortimer solicits the help of Sherlock Holmes to get to the bottom of this curious case.