DeskTop Author is an ebook electronic publishing software that allows you to quickly, easily and professionally create and/or sell page turning electronic publications such as eBooks, eCatalogs, eBrochures, ePresentations, photo albums and much more. Create DNL eBooks for Windows, Mac and Android.
As you can see it still gives the message but it will let you know if the file has not been tampered with and also clearly identifies the owner. It does not prevent the file from being infected. It simply serves to tell you that the file is legitmate and not changed since the signing.
