Mazo de la Roche leaped to prominence as one of the most successful writers of the twentieth century when the first novel in her Whiteoaks of Jalna series won the Atlantic Monthly Prize in 1927. The award was hailed not only as a triumph for Mazo but as marking the coming of age of Canadian literature. Therefore her popularity, which earned her a luxurious life-style that included baronial manors in the English countryside, a retinue of devoted servants, and a fondness for world travel, abated only with her death in 1961. The centre of her life was her overwhelming love for her cousin, Caroline Clement, whom she adopted as a sister and who was her life-long companion, soulmate, and muse. The core of their existence was a secret unwritten play-endlessly changing and growing-that they acted out from the moment they met almost to the end of their lives. In this insightful biography Joan Givner has recovered the hidden life of Mazo de la Roche.