What one reviewer said about Sign of Four (Library Case) by Arthur Conan, Sir Doyle, William Barker:
As the second full-length story of Doyle's Holmes series, this book is a classic. It lacks the landmark status of A Study in Scarlet and the overall drama of The Hound of the Baskervilles, but nevertheless is a must-read for all Holmes fans and is strongly recommended to fans of detective fiction. The crime scene is a classic -- "Watson, when you have eliminated all other possibilities, the remaining possibility, no matter how seemingly improbable, is nevertheless likely".... or something like that.
While A Study in Scarlet deals rather unmercifully with the Mormon colony in Utah, A Sign of Four presents what would now be considered a strikingly politically incorrect perspective on India. It's an historically interesting British viewpoint from late in the last century.
Whether you read a public copy or get it from the University of Virginia on-line archive, I strongly recommend A Sign of Four. It's a quick read, and certainly a better option for spare time than Holmes' seven percent solution.
Download The Sign of the Four from Project Gutenberg
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