Just save the Word DOC file to an HTML or RTF file from within Word and you can then convert that RTF or HTML compatible file into EPUB. Using PDF, TXT, and RTF to convert to EPUB PDF files will ...

Convert the RTF file to a text file using a word processor. To do this, first open the file in a program such as Microsoft Word or OpenOffice Writer.

Does your work involve using different document formats, with PDF being the predominant one? Well, if it does, here's how to convert a document to PDF on iOS. Natively and using third-party apps.