With the decline of Z-Library (due to legal action), indices like Anna’s Archive have become the standard for "updated" books.
Since the specific content of the "updated" index you are referring to isn't visible to me (as it is likely a file, a specific GitHub repository, or a website link), I have drafted a . index of epub books updated
An EPUB is useless if you cannot identify its contents. A superior index prioritizes metadata. With the decline of Z-Library (due to legal