My brother's response:
So much for sales of the Immortals Rules...
We're getting a family deal on tickets to hell apparently.
I played the original (Basic, Master, Companion, Master, Immortal) set, but never AD&D... also Middle Earth Role Playing (which had a great set of rules) and Top Secret:SI (which was just plain awesome).
Wow.
There's not many people that may even remember that one Bren. It was rather short lived.
One can always find a good online resource for them now though.
http://spies-r-us.org/ Great stuff.