Dracula From the Publisher Bookcassette Audiobooks have three hours of listening on each tape - twice the normal amount! Since we record the story on the right and left tracks of stereo tape separately, your stereo tapeplayer must have fully functioning balance control to isolate each speaker. 				    	 					 From the Inside Flap The Bookcassette® format is a special recording technique developed as a means of condensing the full, unabridged audio text of a book to record it on fewer tapes. In order to listen to these tapes, you will need a cassette player with balance control to adjust left/right speaker output. Special adaptors to allow these tapes to be played on any cassette player are available through the publisher or some US retail electronics stores.