This medieval convention confront our print-minded notion of “book.” Likewise, many works are not set “books” at all, since they served as personal notebooks composed by amateurs or customized renditions of well-known texts, so it is often difficult to supply a neat label, let alone a title. In effect, this problem illustrates the invigorating challenges researchers face in engaging medieval manuscript culture on its own terms, apart from our contemporary idea of stable printed book.