First line of The Adventures of Huckleberry Finn (1884) by Mark Twain:

‘You don’t know about me, without you have read a book by the name of The Adventures of Tom Sawyer, but that ain’t no matter. That book was made by a Mr Mark Twain, and he told the truth, mainly’

‘A new US edition of Mark Twain’s classic novel The Adventures of Huckleberry Finn is to be published with a notable language alteration: all instances of
the offensive racial term ‘n*****’ are to be expunged. The word occurs more than 200 times in Huckleberry Finn, first published in 1884, and its 1876 precursor, The Adventures of Tom Sawyer, which tell the story of the boys’ adventures along the Mississippi river in the mid-19th century. In the new edition, the word will be replaced in each instance by ‘slave’. The word ‘injun’ will also be replaced in the text.’

— The Guardian, 5 Jan 2011