What Books should I get


A friend intorduced me to Paranoia years ago so when I found the new XP version I had to get it. Now I am wondering what books I should get and in what order? I am leaning at getting Extreme Paranoia and Flashbacks but am curious what others should I consider. Open to suggestions, other then buy them all :p
Extreme PARANOIA and PARANOIA Flashbacks are both excellent choices, Revanbane, though as a practical matter the Gamemaster Screen is your best choice for your first supplementary product.

There is useful discussion about this selfsame subject in an earlier thread in this selfsame forum, "What should I buy next?"