Free audio book of the month this time as Christianaudio.com is offering is The Holiness of God by R.C. Sproul. You may download it for free. As you might have already figured it out (not sure) that you have to have an account in christianaudio.com in order to have access to download link. Good News! Sign up is free though. You can collect one audio book at a time each month for free in your digital library. They also offer different book format (mp3, m4b, zip etc) and you can download the format of your choice depending on the device you will be using to install the audio book. Follow the link for downloading.