Edith Stein was one of the important early phenomenologists. A German-Jewish philosopher, Discalced Carmelite nun, martyr, and saint who died in Auschwitz, Stein participated in the early 20th century revival of scholasticism and was much admired by John Paul II. `Thine Own Self` focuses on Stein`s later writings and in particular her magnum opus, `Finite and Eternal Being`. Although completed in 1936, Stein`s book was not published at the time because of the new laws against non-Aryan publications, and the work sat completed but unread until after World War II. The recent availability of this book in English makes a substantive scholarly analysis of this major text particularly timely. `Thine Own Self` investigates Stein`s account of human individuality and her mature philosophical positions on being and essence. Sarah Borden Sharkey shows how Stein`s account of individual form adapts the Aristotelian-Thomistic tradition in order to account for evolution and more contemporary insights in personality and individual distinctiveness. Borden Sharkey explains how Stein`s theory of individuality and individual forms is tied to her understanding of essence and being, and she compares Stein`s distinctive metaphysical positions to those of Thomas Aquinas, John Duns Scotus, and Edmund Husserl. In addition to expositing Stein`s metaphysical positions, Borden Sharkey argues that, although Stein`s account of individual forms is both more contemporary and more adequate than John Duns Scotus` haecceitas, it is nonetheless problematic. The book concludes by defending a more Aristotelian-Thomistic understanding of form - albeit one that must be re articulated in light of contemporary and Steinian critiques.