When you steal a book from a bookstore, that copy of the book disappears. The bookstore no longer has it. When you download a file from libgen, does libgen no

When you steal a book from a bookstore, that copy of the book disappears. The bookstore no longer has it. When you download a file from libgen, does libgen no longer have that file? Does the author lose their own copy of their book? What exactly are you stealing (making you have something and depriving someone else of the thing).