""The Sign of the Four"" is a thrilling mystery novel written by Arthur Conan Doyle and featuring the famous detective Sherlock Holmes. The story begins when a young woman named Mary Morstan comes to Holmes with a strange case: she has been receiving valuable pearls in the mail every year on the anniversary of her father's disappearance, along with mysterious notes requesting a meeting. Holmes and his faithful friend Dr. Watson agree to help her investigate and soon find themselves embroiled in a complex web of intrigue involving stolen treasure, a one-legged man, and a deadly Indian cult. As they race to unravel the mystery, Holmes and Watson must use all their wits and courage to solve the case and bring the criminals to justice. Full of suspense, action, and unforgettable characters, ""The Sign of the Four"" is a classic of detective fiction and a must-read for fans of Sherlock Holmes and mystery novels in general.Sherlock Holmes took his bottle from the corner of the mantel- piece, and his hypodermic syringe from its neat morocco case. With his long, white, nervous fingers he adjusted the delicate needle and rolled back his left shirtcuff. For some little time his eyes rested thoughtfully upon the sinewy forearm and wrist, all dotted and scarred with innumerable puncture-marks.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.