How to download and view a file without being copied

Considering that I have files in .epub , .mobi and .pdf formats hosted on a server. Is there any way to download these files internally to an Android application, so that downloaded files can not be copied by users and displayed by the application itself? The ideal would be to be able to show the file allowing the user to interact with same, browsing pages and topics. Even if this functionality is outsourced by another application, but maintaining security. Solutions that are not possible for all formats are also valid.