To delete or unlist a book that has been published on the ElevenReader app, navigate to ElevenReader.io, open the 'Bookshelf' tab, and locate the book you wish to unlist. Click 'View Details' to open the book detail tab, where you will find various options. Select 'Unlist' to remove your book from the ElevenReader app content library.
Once unlisted, your book will no longer be visible to new users.