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• Oil and World Power: A Geographical Interpretation (Pelican) by Peter Randon O'Dell Penguin Books Ltd Paperback 25 September 1986 from£8.08 | RRP: £5.99
• Trust: Releasing the Energy to Succeed by Rita Cruise O'Brien John Wiley & Sons Hardcover 29 August 2001 from£45.05 | RRP: £44.99
• Victoria: The New Napkin Folding: Fresh Ideas for a Well-Dressed Table by Joanne O'Sullivan,Terry Taylor Hearst Communications Paperback 28 February 2006 from£12.75 | RRP: £8.16
• The Late Wise Man: Christmas Musical for Juniors by Denis O'Gorman,Barry Hart Kevin Mayhew Ltd Paperback 1 June 2003 from£20.23 | RRP: £12.99
• The Campaign of 1870-1 by William O'Connor Morris Adamant Media Corporation Paperback 3 August 2001 from£18.89 | RRP: £7.99
• Iveragh Peninsula: An Archaeological Survey of South Kerry (Archaeology/medieval studies) by Ann O Sullivan and John Sheehan Cork University Press Hardcover 1 January 1996 from£48.80 | RRP: £59
• Accent on Achievement: E-Flat Alto Saxophone by John O'Reilly,Mark Williams Alfred Publishing Company Paperback 1 April 1997 from£10.24 | RRP: £5.16
• "Dear, Dirty Dublin" - A City in Distress 1899-1916 by Joseph V. O'Brien University of California Press Hardcover 27 May 1982 from£59.40 | RRP: £44
• Emerging Financial Markets (McGraw-Hill Series in Mass Communication) by David O. Beim,Charles Calomiris McGraw-Hill Higher Education Hardcover 1 November 2000 from£72.05 | RRP: £77.99
• In Search of Birds in Mid-Wales by Brian O'Shea,John Green Artery Publications Paperback 31 December 1991 from£5.73 | RRP: £4.25
• Nelson Mandela HSRC Study of HIV AIDS: HSRC Study of HIV/AIDS Full Report by L.C. Simbayi,O. Shisana HSRC Press Paperback 31 December 2002 from£13.59 | RRP: £15.95
• Allen and Mike's Backpacking Book (Outdoor Activities) by Allen O'Bannon,Mike Clelland Globe Pequot Press Paperback 1 April 2002 from£11.99 | RRP: £9.99
• Railway Picture Book by Jack Hill,O.S. Nock A & C Black Publishers Ltd Hardcover 29 May 1975 from£16.20 | RRP: £12
• The Watercolours of Ireland: Works on Paper in Pencil, Pastel and Paint, c.1600-1914 by Anne O. Crookshank,Knight of Glin Barrie & Jenkins Hardcover 3 November 1994 from£42.50 | RRP: £45
• The Garmin Nuvi Pocket Guide by Jason D. O'Grady Peachpit Press Paperback 20 October 2008 from£6.09 | RRP: £5.99
• The Immutability of God in the Theology of Hans Urs von Balthasar by Gerard F. O'Hanlon Cambridge University Press Hardcover 26 October 1990 from£96.89 | RRP: £70
• Teach Yourself Irish (Teach Yourself Complete Courses) Accompanies Book by Diarmuid O Se,Joseph Sheils Teach Yourself Audio CD 26 December 2003 from£25.34 | RRP: £15.99
• Yoruba Warlords of the 19th Century by Toyin Falola,O.G. Oguntomisin Africa Research & Publications Paperback 9 May 2001 from£20.55 | RRP: £17.99
• Island of the Blue Dolphins (New Windmills) by Mr Scott O'Dell Heinemann Hardcover 20 February 1967 from£11.49 | RRP: £7.75
• Buckling of Bars, Plates and Shells by Don O. Brush,Bo O. Almroth McGraw-Hill Inc.,US Hardcover 1 February 1975 from£54.33 | RRP: £40.25
• Education and Political Transition: Themes and Experiences in East Asia by Mark Bray,W.O. Lee Comparative Education Research Centre Paperback 31 December 2001 from£20.23 | RRP: £28.5
• Now That's What I call a Big Feckin' Irish Book (Feckin' Collection) by Colin Murphy,Donal O'Dea O'Brien Press Ltd Hardcover 1 March 2011 from£16.18 | RRP: £9.99
• Pythagoras Revived: Mathematics and Philosophy in Late Antiquity (Clarendon Paperbacks) by Dominic J. O'Meara Clarendon Press Paperback 6 December 1990 from£41.99 | RRP: £32.5
• Modern Magnetic Materials: Principles and Applications by Robert C. O'Handley Wiley-Blackwell Hardcover 26 January 2000 from£148.66 | RRP: £127
• Invitation to Possibility Land: An Intensive Teaching Seminar with Bill O'Hanlon by Bill O'Hanlon,Robert Bertolino Routledge Hardcover 1 September 1998 from£71.05 | RRP: £28.95