What Does A Book Name Tell Me?
book-name
When you check the metadata of an e-book file, you may come across information about the Book Name. Find out what this value is, where it comes from and why it matters.
The Book Name is the title of the book as it is written inside the file. It is generally the same as the title printed on the cover, and it is stored separately from the name of the file on your computer.
Which files carry it and who wrote it
You find this information in e-book files. EPUB keeps its title in a small description file packaged inside the book, and the Kindle formats and FictionBook store an equivalent. The value was typed by a person: the publisher, the author, or whoever assembled or converted the file using an e-book program such as Calibre, Sigil or a layout application. Nothing measures it and no device fills it in automatically, which is why it is as accurate, or as careless, as the person who entered it.
The file name on disk is a completely separate thing. A book saved as download_2.epub can carry a perfectly correct Book Name, and a neatly named file can carry a wrong one.
What a value looks like
It is free text, so it looks exactly like a title: The Adventures of Sherlock Holmes. It can contain letters, numbers, punctuation and special characters, and it is not limited to Latin script. Cyrillic, Greek, Chinese, Japanese, Arabic and other writing systems appear here just as readily. Some files pack extra detail into the same line, such as a series name, a volume number or an edition, and some leave the field empty.
Why it matters for your file
Reading apps and e-book libraries build their shelves from this value, not from the file name. That is why a book can sit in your library under the wrong title, or under no title at all, while the file itself looks fine in your file manager. Sorting, searching and grouping by author or series all lean on the metadata inside the file.
Converted files are the usual source of trouble. When a book is built from a template or converted from another format, the title of the source can survive into the new file, so the metadata still names the previous book while the contents are new. Checking the Book Name is the quickest way to find out whether your library is wrong or the file is.
For anyone keeping a collection in order, this is the field that makes a catalogue correct. Because it is typed text rather than a measurement, it is also worth a glance before you pass a file on: a working title, a draft label or an internal note occasionally stays in the metadata long after the finished cover says something else.