The title page of a book is a reliable source, since it. together with its verso, usually contains all bibliographically significant data. Generally, the title page is a page at the beginning of a book giving its title and the names of the author and publisher. Prescribing a source of information from which data elements should be derived is a way of specifying how an entity can represent itself. In simpler times, when bibliographic entities were fur the most part books published in Western countries, the choice of source was obviously the title page. the "face of the book".