Judith, Look at the file extension of each file on the CD. (the file extension is the part of the file name which comes after the period. Example: Chapter1.doc or Chapter1.txt If you don't see any file extensions, you need to go into the view menu and set it so file extensions are visible. What happens when you try clicking on one of these files on the CD? Does it open in a word-processing program? Alan Judith wrote: I don't know which kind of file they are. It is an author's compilation of material for other authors.