The Death of Death in the Death of Christ by John Owen
Heavy, dude!
I'll have to take another swing at that sometime. I was in the middle that a couple years ago when I got waylayed by some work related study, and lost track of his argumentation.
I am reading it online from the
http://www.puritanlibrary.com/
Also, the Introduction by J I Packer is wonderful.
http://www.lgmarshall.org/Owen/packer_deathintro.html
It is worth it to wade.