The Sign of the Four is a novel written by Arthur Conan Doyle, the second in the Sherlock Holmes series. The story follows Holmes and his friend Dr. Watson as they investigate the mysterious disappearance of a young woman's father, who went missing years ago while returning from India with a valuable treasure. The case takes them through the seedy underbelly of London, where they encounter a cast of colorful characters, including a one-legged man, a beautiful but treacherous woman, and a gang of vicious criminals. Along the way, Holmes and Watson must use their wits and deductive skills to unravel the complex plot and uncover the truth behind the missing treasure. The Sign of the Four is a thrilling mystery that showcases Conan Doyle's masterful storytelling and introduces readers to the iconic detective duo of Holmes and Watson.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.