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• Perfectionism and the Common Good: Themes in the Philosophy of T. H. Green (Lines of Thought) by David O. Brink Clarendon Press Paperback 31 May 2007 from£40.49 | RRP: £18.99
• The East in the Light of the West: Pt. 1-3: The Birth of Christian Esotericism in the Twentieth Century and the Occult Powers That Oppose it by Sergei O. Prokofieff Temple Lodge Publishing Hardcover 20 November 2009 from£30.16 | RRP: £40
• Rarely Pure and Never Simple: Selected Essays (Haworth gay & lesbian studies) by Scott O'Hara Harrington Park Press Inc Paperback 14 December 1998 from£46.56 | RRP: £9.99
• Tell Someone? by Kevin O'Hara John Blake Publishing Ltd Paperback 28 February 2007 from£7.99 | RRP: £7.99
• Money from Thin Air: the Story of Craig Mccaw, the Visionary Who Invented the Cell Phone Industry, and His Next Billion Dollar Idea by O.Casey Corr Times Books Hardcover 31 December 1998 from£33.75 | RRP: £25
• No Mercy: A Journey to the Heart of the Congo by Redmond O'Hanlon Alfred a Knopf Hardcover 1 April 1997 from£29.51 | RRP: £20.75
• Baal's Legacy by Thomas O'Doherty Eloquent Books Hardcover 28 June 2009 from£35.77 | RRP: £26.5
• Batman: Knightfall by Denny O'Neil Bantam Press Hardcover 18 August 1994 from£13.48 | RRP: £9.99
• Gender and Genocide in Burundi: The Search for Spaces of Peace in the Great Lakes Region (African Issues) by Patricia O. Daley Indiana University Press Paperback 11 June 2008 from£29.68 | RRP: £24.95
• Morocco Under King Hassan by Stephen O. Hughes Ithaca Press Paperback 31 March 2006 from£26.98 | RRP: £19.99
• Statistical Decision Theory and Bayesian Analysis (Springer Series in Statistics) by James O. Berger Springer Hardcover 21 August 1985 from£44.26 | RRP: £72
• Shakespeare's Patron, William Herbert: Politics, Patronage and Power by Brian O'Farrell Continuum Paperback 10 February 2011 from£25.63 | RRP: £18.99
• The Trouble with Guns: Republican Strategy and the Provisional IRA (A Blackstaff paperback original) by Malachi O'Doherty Blackstaff Press Ltd Paperback 1 October 1997 from£16.18 | RRP: £11.99
• Killing Spree by Kevin O'Brien Pinnacle Books,U.S. Mass Market Paperback 1 January 2007 from£9.43 | RRP: £6.99
• Environmentalism (Research in planning and design) by Timothy O'Riordan Pion Ltd Hardcover 18 October 1976 from£15.52 | RRP: £11.5
• The Irish Sport Horse by Nicholas O'Hare Nicholas O'Hare Paperback 31 March 2002 from£24.30 | RRP: £15
• The Creation: An Appeal to Save Life on Earth by Edward O. Wilson W. W. Norton & Co. Hardcover 19 September 2006 from£21.58 | RRP: £15.99
• Bull's Handbook of Sports Injuries, 2/e by William O. Roberts McGraw-Hill Medical Paperback 1 February 2004 from£57.10 | RRP: £56.99
• Maiden Voyage by Judith O'Brien Pocket Books Mass Market Paperback 1 January 1997 from£5.89 | RRP: £4.06
• Treason's Harbour (Aubrey-Maturin) by P O'Brian W. W. Norton & Co. Hardcover 26 January 1996 from£36.50 | RRP: £17.99
• The Court and the Constitution of India: Summits and Shallows by O. Chinnappa Reddy Oxford University Press, USA Hardcover 15 April 2009 from£121.09 | RRP: £79.69
• Gluten-free, Sugar-free Cooking: Over 200 Delicious Recipes to Help You Live a Healthier, Allergy-free Life by Susan O'Brien Marlowe & Co Paperback 3 April 2006 from£18.88 | RRP: £11.99
• Muhammad Ali: A Biography (Greenwood Biographies) by Anthony O. Edmonds Greenwood Press Hardcover 30 December 2005 from£25.00 | RRP: £16.95
• Learning Irish by Micheal O Siadhail Yale University Press Audio Cassette 1 July 1988 from£30.13 | RRP: £18.21
• Picturing Landscape in an Age of Extraction: Europe and Its Colonial Networks, 1780–1850 by O'Rourke, Stephanie University of Chicago Press Hardcover 27 November 2025 from£32.22 | RRP: £