Hi to all! Thanks to Marlaina's had Chris's suggestions, I have done a bit more experimenting. While their suggestions were helpful, I will go a bit further in explaining the process. After choosing one book, I copied it to the Bookport. Then a while later, I went back and chose another book. Remember I said that Bookport transfer wasn't running nor was Bookport connected. So when I went to download my next chosen book, format 4 wasn't available as one of my choices. Other circumstances then required me to reboot. After rebooting, I went back to Audible, choosing my library link. Now I found the title I had chosen yesterday. Format 4 was now available, so I selected it and have transferred this to the bookport as well. So it seems that not only do you need to be sure that the bookport is not connected or Bookport transfer is running, but if they recently have been, it is necessary to reboot before format 4 is available. Hope this might help someone else. Cheers, Dave