When Jonathan Swift suggested in 1729, in his pamphlet A Modest Proposal, that the Irish might survive overpopulation if only they could be persuaded to eat their own babies, the Irishman was employing that favorite tool of writers and wits: irony. Now, in an entertaining and intriguing new book, D. J. Enright, acclaimed editor of The Oxford Book of Death, has turned his attention to the practice of irony and its many manifestations in both literature...