gutenberg_add_sections
                        Add a section column to a Gutenberg tibble
gutenberg_authors       Metadata about Project Gutenberg authors
gutenberg_cache_clear_all
                        Clear all files from the Gutenberg cache
gutenberg_cache_dir     Get the active cache directory path
gutenberg_cache_list    List files in the Gutenberg cache
gutenberg_cache_remove_ids
                        Delete specific files from the cache
gutenberg_cache_set     Set the Gutenberg cache type
gutenberg_download      Download one or more works using a Project
                        Gutenberg ID
gutenberg_get_all_mirrors
                        Get all mirror data from Project Gutenberg
gutenberg_get_mirror    Get the recommended mirror for Gutenberg files
gutenberg_languages     Metadata about Project Gutenberg languages
gutenberg_metadata      Gutenberg metadata about each work
gutenberg_strip         Strip header and footer content from a Project
                        Gutenberg book
gutenberg_subjects      Gutenberg metadata about the subject of each
                        work
gutenberg_works         Get a filtered table of Gutenberg work metadata
sample_books            Sample Book Downloads
