This biography investigates the life and creative evolution of Agatha Christie, seeking to reconcile the private woman with the public persona of the world's most famous mystery writer. Janet P. Morgan utilizes extensive access to private papers and family archives to construct a comprehensive portrait of Christie's upbringing, her professional struggles, and the inspirations behind her most iconic literary creations. The narrative framework follows a chronological progression, examining how Christie's personal experiences—including her disappearance in 1926 and her travels in the Middle East—directly influenced the mechanics and themes of her detective fiction.

This work is regarded as a foundational text for scholars and enthusiasts seeking a detailed, well-documented account of Christie's life. The biography is noted for its thorough research and balanced approach to the subject's private and professional spheres.