It has been 100 years since Agatha Christie wrote her first novel and created the formidable Hercule Poirot. Arguably the greatest crime writer in the world, Christie's books still sell over four million copies each year --- more than 30 years after her death --- and it shows no signs of slowing. But who was the woman behind these mystifying, yet eternally pleasing, puzzlers? Biographer Laura Thompson reveals the Edwardian world in which Christie grew up, explores her relationships, including those with her two husbands and daughter, and investigates the many mysteries still surrounding Christie's life, most notably her 11-day disappearance in 1926.