Someone posted a link to this on a forum I was reading. It contains a lot of information about the Megami Tensei series that I didn't know.
http://hg101.classicgaming.gamespy.com/megaten/megaten.htm
I didn't even know that the Megami Tensei anime OAV that I saw was based on the novel which the Megaten games are based on. I thought it must have been based on the first game just because I don't know anything about it. ^_^;;
See how little I knew?
See also:
Digital Devil Story novels by Nishitani Aya, translated into English
Shin Megami Tensei game translation patch
Shin Megami Tensei II game translation patch
Wikipedia page