Though Sir Arthur Conan Doyle's name is recognized the world over, for decades the man himself has been overshadowed by his better understood creation, Sherlock Holmes, who has become one of literature's most enduring characters. Based on thousands of previously unavailable documents, Andrew Lycett, author of the critically acclaimed biography Dylan Thomas, offers the first definitive biography of the baffling Conan Doyle, finally making sense of a long-standing mystery: how the scientifically minded creator of the world's most rational detective himself succumbed to an avid belief in spiritualism, including communication with the dead.

Lycett assembles the many threads of Conan Doyle's life, including the lasting impact of his domineering mother and his wayward, alcoholic father; his affair with a younger woman while his wife lay dying; and his nearly fanatical pursuit of scientific data to prove and explain various supernatural phenomena. Lycett reveals the evolution of Conan Doyle's nature and ideas against the backdrop of his intense personal life, wider society and the intellectual ferment of his age. In response to the dramatic scientific and social transformations at the turn of the century, he rejected traditional religious faith in favor of psychics and séances—and in this way he embodied all of his late-Victorian, early-Edwardian era's ambivalence about the advance of science and the decline of religion.

The first biographer to gain access to Conan Doyle's newly released personal archive—which includes correspondence, diaries, original manuscripts and more—Lycett combines assiduous research with penetrating insight to offer the most comprehensive, lucid and sympathetic portrait yet of Conan Doyle's personal journey from student to doctor, from world-famous author to ardent spiritualist.