George Orwell:"The pamphlet is a one man show. One has complete freedom of expression, including, if one chooses, the freedom to be scurrilous, abusive and seditious; or, on the other hand, to be more detailed, serious and "highbrow" than is ever possible in a newspaper or in most kinds of periodicals. At the same time, since the pamphlet is always short and unbound, it can be produced much more quickly than a book, and in principle, at any rate, can reach a bigger public. Above all, the pamphlet does not have follow any prescribed pattern. It can be in prose or in verse, it can consist largely of maps or statistics or quotations, it can take the form of a story, a fable, a letter, an essay, a dialogue, or a piece of "reportage". All that is required of it is that shall be topical, polemical and short. "
Intro in Orwell's British Pamphleteers