http://www.audiobooksforfree.com
Go through their registration process and you can
download their books at the low quality 8Kbps rate
for free. You can pay a subscription to get higher
bitrates.
If your player cannot handle 8kbps (many need at
least 32), you can batch convert using a number of
audiotools. I tend to use winamp because it is free.
You may need to install the Lame codec:
http://www.softpedia.com/get/Multimedia/Audio/Audio-CD-Rippers-Encoders/LAM...
In Winamp, right-click and select the "Options" menu,
then select Plug-Ins -> Output.
Change the output from "Direct Sound" to "Disk" so that
when you play your 8Kbps files they get dumped to the
HDD. Click on "Configure" to tell winamp where to put
them, click on "Convert to Format", select the Lame
codec and whatever bitrate you want.
Convoluted, but free and works for me.
JB