Liber begins by detailing Rashi's life in 11th-century France, describing the historical and social context in which he lived. The biography explores Rashi's early education, his studies in various centers of Jewish learning, and his eventual establishment of a yeshiva (Jewish educational institution) in Troyes. Rashi's deep knowledge of Jewish law, as well as his ability to explain complex religious texts in a clear and accessible manner, made his works foundational to Jewish scholarship.

The book also delves into Rashi's writing, particularly his commentary on the Torah, which is known for its simplicity and clarity. Liber highlights how Rashi's work provided a bridge between the plain meaning of the biblical text and deeper interpretive layers, making it a cornerstone for both religious study and daily practice among Jews. Additionally, the book discusses Rashi's Talmudic commentary, which remains essential to understanding the Talmud today.