An Apple Books Classic edition.

The methods of deduction that made Sherlock Holmes literature’s most beloved detective are at the heart of this exquisitely plotted mystery.

A short time after the suspicious disappearance of her father, Mary Morstan began receiving strange gifts. Each year, someone sends her a priceless pearl in the mail with no name attached. This year, the pearl has arrived with a note inviting her to finally meet the unknown sender—and Holmes and Watson plan to attend the rendezvous.

Before long, the pair uncover a chain of events involving betrayal, revenge, and secrets originating far away in British-controlled India. In a fascinating whodunit shaded by the expansion of the British Empire, Dr. Watson’s descriptions of Holmes’ brilliant mind in action are every bit as irresistible as the mystery itself.