When you create a project you choose the Audio Project Type, either Scripture or General.
Book appears as the name of a column in the Sections & Passages tab. It can use the names of books found in the canon or apocrypha, and also Preface, Introduction, Back Matter and so on. Spreadsheet convention has additional information.
If you publish the project, the book name appears in the Book (
) and Alternate Name (
) rows.