While I was searching around the B.net forums (to find those Audio Logs), I found out that the story for ODST is actually based off of Dante Alighieri's epic poem, Divine Comedy.
http://www.bungie.net/Forums/posts.aspx?postID=37475960&postRepeater1-p=1
That goes into the connections between the Divine Comedy and the ODST story. It's very interesting and will give you one of those "Aw, no way!" moments of geekiness.
Anyway, enjoy!
Burn the land and boil the sea, you can't take the sky from me.