 The great mystery about the Lombard’s Sentences is how a book so important for centuries has been so greatly neglected by scholars, even by those interested in and sympathetic to medieval scholasticism. One intriguing suggestion is that it is tied to the genre of the work and the different notion of authorship thereby implied. Giulio Silano argues that the work is most analogous to a modern legal casebook, and that Peter, as the casebook author, is governed most directly not by his views but those of the authorities, and the pedagogical goal is not the expression and promulgation of his views, or even the mere learning of the authorities’ views but rather the initiation of the student into a discipline, as in jurisprudence, a way of thinking and applying past authorities to present questions or conflicts (Silano 2007). Thus we discount and misunderstand Peter Lombard’s achievement if we evaluate it in light of modern notions of authorship and originality.