ElGato127 said:ITIL seems like a good candidate for the audio category, also CASP and CISSP.
PC509 said: CISSP, try the Kelly Handerhand videos (download to MP3). They are excellent.Also, check out Amazon for audiobooks (I know there is a CISSP one available). I think they use Audible, which if you haven't used it yet can have a 2 week free trial, I believe. A lot of security podcasts available out there. You can also use YouTube and just run that and listen to it over Bluetooth while driving. It's a GREAT way to supplement your studying while on your commute. Even if you're not paying 100% attention, you're going to pick things up. After listening for a while, it'll all be review. I found the audio part of it extremely helpful for the CISSP.