It defies description. The kernel of it is a satire on religious controversies, but that makes up about a third of the actual text. The rest is a series of prologues, forewords, dedications, prefaces, afterwords, epilogues and appendices, the sheer profusion of which suggest very much that Swift is poking dire fun at the idea of writing itself. In that respect, it goes further than any 20th century French golden boy of artistic revolt; Artaud looks like a stamped-in-tin romantic poet when set against Swift's manic nihilism. A Tale of a Tub is the closest anyone has ever got to writing a book that tackles head-on the futility of writing books, but that's only one interpretation of it. It exhausts interpretation by being as near as possible about nothing at all - and hence about everything. Plus it's not even 200 pages long. Swift never wrote as irresponsibly ever again, although the Travels, 'A Modest Proposal', the Bickerstaffe Papers, the 'Verses on the Death of Dr. Swift' and the Drapier's Letters are all admirable enough. A Tale of a Tub is as comprehensive a piece of literary terrorism as was ever attempted.