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• Secret Lives of the U.S. Presidents: Strange Stories and Shocking Trivia from Inside the White House: 1 by Cormac O'Brien Quirk Books Paperback 7 February 2017 from£10.39 | RRP: £
• Mock the Week by Dara O Briain Sound Entertainment Limited Audio CD 3 December 2007 from£N/A | RRP: £9.99
• Thirteen-gun Salute (Aubrey-Maturin) by Patrick O'Brian W. W. Norton & Co. Paperback 17 September 1992 from£12.35 | RRP: £9.99
• A Spiritual Odyssey: Diary of an Ordinary Catholic by Brian O'Hare Columba Press Paperback 15 November 2005 from£18.22 | RRP: £12.99
• Openness, Secrecy, Authorship: Technical Arts and the Culture of Knowledge from Antiquity to the Renaissance by Pamela O. Long The Johns Hopkins University Press Hardcover 13 July 2001 from£49.00 | RRP: £40
• What's Next Door? by Nicola O'Byrne Nosy Crow Ltd Paperback 5 April 2018 from£6.89 | RRP: £6.99
• Complete Stories by Flannery O'Connor Faber and Faber Paperback 21 January 1991 from£17.53 | RRP: £12.99
• Something for Nothing: Arbitrage and Ethics on Wall Street by Maureen O'Hara WW Norton & Co Hardcover 7 October 2016 from£19.99 | RRP: £
• Escape!: The Complete Agoraphobia Recovery Course by Joseph O'Neill Chipmunkapublishing Paperback 4 April 2008 from£15.00 | RRP: £15
• The Irish in Britain (Torc books) by Kevin O'Connor Gill & Macmillan Ltd Paperback 1 September 1974 from£0.87 | RRP: £0.65
• Theory of Finite Simple Groups (New Mathematical Monographs) by Gerhard O. Michler Cambridge University Press Hardcover 21 September 2006 from£214.83 | RRP: £110
• Shaken and Stirred (Mills & Boon Blaze) (Blaze Romance) by Kathleen O' Reilly Harlequin, Mills & Boon Paperback 17 July 2009 from£4.30 | RRP: £3.19
• The Nirv Adventure Bible for Young Readers by Lawrence O. Richards Zondervan Hardcover 1 August 2000 from£25.63 | RRP: £15.49
• What Makes Tough Guys Tough: The Secret Domain by Jamie O'Keefe New Breed Publishing Paperback 1 May 1998 from£17.53 | RRP: £12.99
• Virginia Woolf: Sources of Madness and Art by Jean O. Love University of California Press Hardcover 1 June 1978 from£14.17 | RRP: £16.7
• W & R Jacob: Its Impact on Dublin Life 1851-2000 by Seamas O Maitiu The Woodfield Press Paperback 18 September 2001 from£20.92 | RRP: £15.5
• The Manchester Martyrs by Joseph O'Neill The Mercier Press Ltd Paperback 1 March 2012 from£16.99 | RRP: £12.99
• Georgia O'Keeffe by Georgia O'Keeffe Penguin Books Australia Hardcover 1 April 1982 from£73.91 | RRP: £50.65
• Reproduction and Human Welfare, a Challenge to Research: Review of the Reproductive Sciences and Contraceptive Development by Roy O. Greep,etc. MIT Press Hardcover 1 March 1977 from£42.52 | RRP: £31.5
• Minds of Winter by Ed O'Loughlin riverrun Hardcover 25 August 2016 from£13.59 | RRP: £16.99
• Wild Decembers by Edna O'Brien Phoenix Paperback 6 July 2000 from£8.99 | RRP: £7.99
• The Yellow Admiral (Aubrey-Maturin) by Patrick O'Brian Blackstone Audiobooks Audio CD 3 September 2007 from£36.38 | RRP: £24.39
• Competitive Marketing: A Strategic Approach by John O'Shaughnessy Thomson Learning Hardcover 14 September 1995 from£41.85 | RRP: £31
• Adventure Bible for Early Readers-NIRV by Lawrence O. Richards Zonderkidz Leather Bound 1 August 2009 from£16.79 | RRP: £22.86
• If You Were Me: The charming bestseller that asks: what would YOU do? by O'Flanagan, Sheila Headline Review Paperback 12 March 2015 from£8.39 | RRP: £