First published in 1890, The Sign of Four is Sir Arthur Conan Doyle's second book starring legendary detective Sherlock Holmes. The story is complex, involving a secret between four ex-cons from India and a hidden treasure. More complex than the first Holmes novel, The Sign of Four also introduces the detective's drug habit and leaves breadcrumbs for the reader that lead toward the final resolution. Readers are offered an explanation of the mystery from the killer's perspective, encouraging a sense of sympathy with the condemned that the previous book also lacked. Any fan of the mystery genre should consider this book a must-read. Scottish surgeon and political activist SIR ARTHUR CONAN DOYLE (1859-1930) turned his passions into stories and novels, producing fiction and nonfiction works sometimes controversial (The Great Boer War, 1900), sometimes fanciful (The Coming of the Fairies, 1922), and sometimes legendary (The Adventures of Sherlock Holmes, 1892).

Viviane, a beautiful Celtic princess, unwittingly unravels the spell that binds the spirit of the evil Idoc within a circle of tall stones. Once released, the sorcerer-priest uses his powers to deliver vengeance upon those responsible for his original enslavement - including the Princess Viviane. With Idoc in possession of the body of Prince Caradawc, her betrothed, Viviane can no longer judge safely between friend and foe, between this life and previous incarnations. Yet to rescue Caradawc from his nightmare, she must risk everything to reach the dreaded dark tower where Idoc waits. And, to ensure victory over evil, she must seek out Lucifer's Emerald. She journeys through dreams and nightmare, beauty and horror, good and evil to save her lover and destroy the sorcerer-priest. This is a quest for spiritual grace which is beautifully depicted and includes all the timeless ingredients of legend.