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• The Holy Land: An Oxford Archaeological Guide from Earliest Times to 1700 (Oxford Archaeological Guides) by Jerome Murphy-O'Connor Oxford Paperbacks Paperback 26 February 1998 from£25.63 | RRP: £18.99
• The Men Commandments by Christian O'Connell Collins Hardcover 15 September 2008 from£25.63 | RRP: £18.99
• Mrs Reinhart & Other Stories by Edna O'Brien Weidenfeld & Nicolson Hardcover 22 February 1990 from£16.13 | RRP: £11.95
• Chasing Daylight:How My Forthcoming Death Transformed My Life by Gene O'Kelly McGraw-Hill Professional Hardcover 1 February 2006 from£16.18 | RRP: £11.99
• Everything That Rises Must Converge by Flannery O'Connor Farrar, Straus & Giroux Inc Paperback 1 August 1996 from£13.71 | RRP: £7.75
• The Letter of Marque by Patrick O'Brian HarperCollins Hardcover 17 August 1998 from£22.93 | RRP: £16.99
• My Friend Flicka by Mary O'Hara HarperPaperbacks Paperback 29 February 1988 from£6.73 | RRP: £4.99
• The Vanishing Act of Esme Lennox by Maggie O'Farrell Harvest Books Paperback 2 June 2008 from£12.69 | RRP: £9.49
• After You'd Gone by Maggie O'Farrell Penguin Books Paperback 1 March 2002 from£15.98 | RRP: £10.85
• Augustine: Sinner and Saint: A New Biography by James J O'donnell Profile Books Paperback 9 March 2006 from£17.53 | RRP: £12.99
• Treason's Harbour by Patrick O'Brian Paperback from£8.24 | RRP: £
• Winter House (Kathleen Mallory Novels) by Carol O'Connell Berkley Paperback 6 September 2005 from£8.73 | RRP: £5.54
• The Xanadu Talisman by Peter O'Donnell Macmillan Paperback 10 December 1982 from£2.02 | RRP: £1.95
• The History of the Baltic States (Greenwood Histories of the Modern Nations) by Kevin O'Connor Greenwood Press Hardcover 30 November 2003 from£30.00 | RRP: £26.95
• Volkskapitalisme: Class, Capital and Ideology in the Development of Afrikaner Nationalism, 1934-1948 (African Studies) by Dan O'Meara Cambridge University Press Paperback 19 March 2009 from£37.99 | RRP: £19.99
• The Secret of Nimh: Mrs. Frisby and the Rats of Nimh by Robert C. O'Brien Scholastic US Paperback 1 August 1995 from£6.07 | RRP: £4.5
• Irish Dialects Past and Present (Irish language - Irish dialects) by Thomas F. O'Rahilly Dublin Institute for Advanced Studies Hardcover 1 April 1972 from£16.20 | RRP: £12
• Banking: A Very Short Introduction (Very Short Introductions) by ,Wilson, John O. S. OUP Oxford Paperback 8 December 2016 from£6.39 | RRP: £
• I Could Read the Sky by Timothy E. O'Grady The Harvill Press Hardcover 18 September 1997 from£20.23 | RRP: £14.99
• Identifying Emotional and Psychological Abuse: A Guide for Childcare Professionals by Kieran O'Hagan Open University Press Paperback 1 June 2006 from£26.09 | RRP: £23.99
• Spying on Ireland: British Intelligence and Irish Neutrality during the Second World War by Eunan O'Halpin OUP Oxford Hardcover 17 April 2008 from£49.49 | RRP: £34
• Do One Thing Different: And Other Uncommonly Sensible Solutions to Life's Persistent Problems by William Hudson O'Hanlon William Morrow Hardcover 13 April 2000 from£14.93 | RRP: £16
• Fletcher's Paradox by Richard J. O'Brien Lulu.com Paperback 23 February 2005 from£22.27 | RRP: £16.5
• Augustine's City of God: A Reader's Guide by Gerard O'Daly OUP Oxford Paperback 29 January 2004 from£25.59 | RRP: £27
• 11 Emerald Street by Hugh O'Donnell Jonathan Cape Ltd Paperback 8 April 2004 from£13.50 | RRP: £10