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• Tell Me This Is Normal: New and Selected Poems by Julie O'Callaghan Bloodaxe Books Ltd Paperback 10 January 2008 from£12.08 | RRP: £8.95
• Digging the Vein by Tony O'Neill Contemporary Press Paperback 9 February 2006 from£10.84 | RRP: £7.3
• Critical Journey: Stages In The Life Of Faith by Janet O. Hagberg Sheffield Pub Co Paperback 31 December 2004 from£34.91 | RRP: £16.6
• Statistical Methods for Environmental Pollution Monitoring by Richard O. Gilbert John Wiley & Sons Hardcover 1 February 1987 from£62.81 | RRP: £120
• Mailing May by Michael O. Tunnell William Morrow Paperback 1 June 2001 from£5.75 | RRP: £4.25
• Regional History of the Railways of Great Britain: The North West v. 10 (A regional history of the railways of Gret Britain) by Geoffrey O. Holt David & Charles Hardcover 27 July 1978 from£10.12 | RRP: £7.5
• Visions of Another World: The Autobiography of a Medium by Stephen O'Brien Voices Paperback 1 July 2000 from£10.78 | RRP: £7.99
• Essays in Trespassing: Economics to Politics and Beyond by Albert O. Hirschman Cambridge University Press Paperback 31 August 1981 from£30.99 | RRP: £23.99
• Duncan: A Brave Rescue [With Read-Along CD] (Pet Tales) by Liam O'Donnell Soundprints Paperback 1 March 2004 from£11.77 | RRP: £4.49
• On the Production of Subjectivity by Simon O'Sullivan Palgrave Macmillan Paperback 11 June 2014 from£40.57 | RRP: £24.99
• James Larkin (Radical Irish Lives) by Emmet O'Connor Cork University Press Paperback 18 September 2002 from£16.69 | RRP: £16.5
• Bande a Part: New York Underground 60s to 80s by Glen O'Brien Gingko Press, Inc Paperback 30 June 2007 from£33.75 | RRP: £32
• Rough Guide Directions Cancun and Cozumel by Zora O'Neill Rough Guides Ltd Paperback 26 May 2005 from£9.43 | RRP: £6.99
• Consilience by Edward O. Wilson Pantheon Books Inc Paperback 17 September 1998 from£11.58 | RRP: £9.99
• Beside Yourself with Comfort: Hypnotic Help for Chronic or Acute Pain Relief by Bill O'Hanlon Crown House Publishing Ltd Audio CD 31 July 2009 from£17.31 | RRP: £13.99
• Back to the Front: An Accidental Historian Walks the Trenches of World War I by Stephen O'Shea Robson Books Ltd Paperback 25 October 1999 from£12.13 | RRP: £8.99
• The Power of Charismatic Healing: A Personal Account by Andy O'Neill The Mercier Press Ltd Paperback 1 October 1985 from£9.43 | RRP: £6.99
• Differential Analysis on Complex Manifolds (Graduate Texts in Mathematics) by Raymond O. Wells Springer Hardcover 16 November 2007 from£24.26 | RRP: £42.99
• Caribbean Hiking: A Guide to Thirty of the Caribbean's Best Islands by Timothy O'Keefe Menasha Ridge Press Inc. Paperback 1 October 2001 from£13.48 | RRP: £11.99
• Jacquot and the Waterman by Martin O'Brien Headline Book Publishing Paperback 7 February 2005 from£10.99 | RRP: £10.99
• Battle Maps of the Civil War: American Heritage by Richard O'Shea Council Oak Books,U.S. Hardcover 1 January 2009 from£39.15 | RRP: £29
• W.Robertson Smith and the Sociological Study of Religion by T.O. Beidelman University of Chicago Press Hardcover 1 December 1974 from£7.42 | RRP: £6.3
• Woofing it Down: The Quick & Easy Guide to Making Healthy Dog Food at Home by Patricia O'Grady AuthorHouse Hardcover 5 June 2007 from£19.99 | RRP: £18.49
• Archaeology of Atlantic Africa and the African Diaspora (Blacks in the Diaspora) by Akinwumi O. Ogundiran Indiana University Press Hardcover 15 October 2007 from£64.80 | RRP: £44
• Legends and Lies (Bill O'Reilly's Legends and Lies) by O'Reilly, Bill Henry Holt & Company Inc Hardcover 1 July 2015 from£24.75 | RRP: £