Joyce was fascinated by error throughout his writing career, from the malapropisms of characters in Dubliners, through to misquotations and misappropriations in A Portrait of the Artist as a Young Man and the errors and gaffes committed by Leopold Bloom in Ulysses. This interest culminates in the ceaseless perversions of language, perspective and fact in Finnegans Wake. Error is not, however, something that Joyce only writes about: it happens to him and his texts in the form of misprints and inadvertent factual errors, through the interventions of others and through lapses in Joyce's own...