Ebooks simply mean electronic books.Ebooks are in pdf format and you can convert to pdf from any file you can print which is complied with MSWord,Excel,Powerpoint to an Ebook using PrimoPdf.To convert files of msword you will have to go to FILE-PRINT,in the printers dialog box,where you will be asked to choose printer,choose primopdf.Follow the instructions,adjust the settings if you want and you are good to go,save and start sharing it & selling it.