This famous pamphlet is included in my list just in case anybody has missed it. Its huge historical significance need not hide the fact that it is actually great fun to read.

It contains, for instance, the timeless, and possibly still the best, put-down of the pretentious claims to legitimacy of the British monarchy, and hence of the British state:
 

A French bastard landing with an armed banditti, and establishing himself king of England against the consent of the natives, is in plain terms a very paltry rascally original. (P.78)

Nicholas Dykes