Sir Arthur Conan Doyle was born in Edinburgh in 1859 and died in 1930. Penguin publish all the books about the great detective, A Study in Scarlet, The Sign of Four, The Adventures of Sherlock Holmes, The Memoirs of Sherlock Holmes, The Hound of the Baskervilles, The Return of Sherlock Holmes, The Valley of Fear, His Last Bow, The Casebook of Sherlock Holmes, The Uncollected Sherlock Holmes and The Penguin Complete Sherlock Holmes.

A dense yellow miasma swirls in the streets of London as Sherlock Holmes and Dr Watson accompany a beautiful young woman to a sinister assignation. For Mary Marston has received several large pearls...; one a year for the last six years – and now a mystery letter telling her she is a wronged woman. If she would seek justice she is to meet her unknown benefactor, bringing with her two companions. But unbeknownst to them all, others stalk London's fog-enshrouded streets: a one-legged ruffian with revenge on his mind...; and his companion, who places no value on human life...