If you see a gray "Download" button, the book is likely not available for offline reading. If you see an error after clicking download, follow the steps below.
To fix download issues for borrowed books on Archive.org ensure you are using the "Borrow for 14 days" how to fix download a borrowed book from archiveorg
: Only books borrowed for 14 days are typically available for download. Books borrowed for 1 hour generally only allow for online reading through the browser. If you see a gray "Download" button, the