See this online ebook:
- Apologia Pro Vita Sua, by Blessed John Henry Cardinal Newman
The 1864 edition, entitled Apologia Pro Vita Sua; Being a Reply to a Pamphlet Entitled “What, then, does Dr. Newman mean?”, is available in various formats at Open Library and Internet Archive (London: Longman, Green, Longman, Roberts, and Green, 1864), as well as at Project Gutenberg and Many Books.net (London: J. M. Dent & Sons; New York: E.P. Dutton & Co.). An incompletely proofread copy based on this edition may be read online at the Modern History Sourcebook.
The 1865 edition or later variants thereof, entitled Apologia Pro Vita Sua; Being a History of His Religious Opinions, may be read online (here) at Newman Reader (London, New York, Bombay, and Calcutta: Longmans, Green, and Co., 1908), and is available in various formats at Internet Archive and Open Library (London: Longmans, Green, 1895), at Many Books.net (London, New York: Longmans, Green, and Co., 1990), at Internet Archive and Open Library (London, New York: Longmans, Green, 1888), and at Internet Archive and Open Library (London: Longmans, Green, Reader, and Dyer, 1882).
An MP3 audiobook of the 1865 edition is available at Libri Vox.
Note that the 1865 edition and its post-1865 variants are chiefly distinguished by the removal of express mentions of Charles Kingsley (whose attack on Cardinal Newman was tellingly refuted with the Apologia), which required the renumbering of chapters and the writing of new prefatory material; whereas the 1864 edition had recounted in length the Kingsley-Newman exchange. The 1865 preface explained the differences in more detail. Please see Modern History Sourcebook for a useful summary of the different editions.
The combined or Oxford edition, entitled Newman’s Apologia Pro Vita Sua, The Two Versions of 1864 & 1865; Preceded by Newman’s and Kingsley’s Pamphlets, with an Introduction by Wilfrid Ward (London, Edinburgh, Glasgow, New York, Toronto, Melbourne, Bombay: Henry Frowde, Oxford University Press, 1913), may be read online (here) at Newman Reader, and is available in various formats at Internet Archive and Open Library, with a second copy at Internet Archive and Open Library.