ChristanAudio.com's free monthly audiobook is Augustine's classic, On Christian Doctrine.
"From the time that Saint Augustine finished On Christian Doctrine until the end of the Middle Ages, this book was considered by Christians to be one of the most important ever written. Challenging at times though surprisingly relevant for the modern reader, Augustine's book discusses the interpretation of Scripture. It remains valuable for church leaders and serious lay Christians alike."
Receive this quality recording as a free download by going to christianaudio.com and using coupon code: APR2007
(HT: Travis Carden)