I don't see how plain text in zip files is any more searchable than epubs (which are each just plaintext-heavy XML files wrapped in a zip file). And PDFs potent

I don't see how plain text in zip files is any more searchable than epubs (which are each just plaintext-heavy XML files wrapped in a zip file). And PDFs potentially containing malicious code is an argument against using PDF, not an argument for using plaintext specifically. Being viewable on every device is a decent reason, I just don't personally think it's worth the degradation in reading quality. > if the book is missing (15%), that means the text could not be extracted. I saw that, I just don't understand why a book that isn't included has an entry in the CSV file. If the automated tool fails to extract the text from the book to include in the archive, then why put it in the index file?