your car player may not play mp3 file formats when you burn them, tell it to burn an audio cd, if your burn software doesnt do this use windows media player and tell it to convert, the cdr's wont be long enough for one book so get a mp3 file splitter, go to zdnet.com they have try for 30 days, i just use the program until my 30 days runs out and then i get another. make a new folder on your desk top and tell the file splitter to split in that folder, then rename it using copy and paste