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• Jacquot and the Angel by Martin O'Brien Headline Book Publishing Paperback 26 September 2005 from£11.47 | RRP: £10.99
• Penny the Star (Penny the Pencil Series) by Eileen O'Hely The Mercier Press Ltd Paperback 1 June 2007 from£10.93 | RRP: £7.99
• Where God Meets Man: Luther's Down-to-earth Approach to the Gospel by Gerhard O. Forde Augsburg Fortress Paperback 1 January 1991 from£12.27 | RRP: £10.99
• Mind Your Manners: A Guide to Good Behaviour by Robert O'Byrne Prion Books Ltd Paperback 7 August 2006 from£9.43 | RRP: £6.99
• Sean Lemass: A Biography by Michael O'Sullivan Blackwater Press Paperback 1 November 1995 from£20.23 | RRP: £14.99
• Probability, Statistics and Queueing Theory with Computer Science Applications (Computer science and applied mathematics) by Arnold O. Allen Academic Press Inc Hardcover 1 September 1978 from£43.20 | RRP: £32
• Cristiano Ronaldo (Artnik Football) by Michael O'Connell Artnik Paperback 15 May 2006 from£N/A | RRP: £8.99
• Irish Pedigrees; Or, the Origin and Stem of the Irish Nation by John O'hart Unknown Paperback 9 December 2009 from£20.95 | RRP: £18.45
• Shadows in the Grass: Britain in the Southern Sudan, 1918-56 by Robert O. Collins Yale University Press Hardcover 1 July 1983 from£72.90 | RRP: £54
• Political Astrology by Michael O'Reilly Wingspan Press Paperback 31 July 2005 from£19.61 | RRP: £12.17
• When it Feels so Right (Kimani Romance) by Celeste O. Norfleet KIMANI PRESS Mass Market Paperback 16 October 2009 from£6.73 | RRP: £4.99
• In Trouble Again: A Journey Between Orinoco and the Amazon (Vintage Departures) by Redmond O'Hanlon Vintage Books USA Paperback 1 April 1990 from£13.42 | RRP: £9.67
• System Verification: Proving the Design Solution Satisfies the Requirements by Jeffrey O. Grady Academic Press Hardcover 7 June 2007 from£84.50 | RRP: £53.99
• Black Cat in the Window by Liam O Murchu Methuen Publishing Ltd Paperback 12 October 2000 from£9.43 | RRP: £6.99
• Trusted Criminals: White Collar Crime in Contemporary Society by David O. Friedrichs Wadsworth Publishing Co Inc Paperback 4 September 2003 from£52.63 | RRP: £40.99
• The fall of the shell (The Pelbar cycle) by Paul O Williams Ballantine Mass Market Paperback from£59.12 | RRP: £
• The Ultimate Player's Guide to Minecraft by Stephen O'Brien QUE Paperback 22 September 2015 from£15.99 | RRP: £19.99
• Easy to Be Green: Simple Activities You Can Do to Save the Earth (Little Green Books) by Ellie O'Ryan Simon Scribbles Paperback 6 January 2009 from£6.05 | RRP: £3.38
• The Seven Serpents Trilogy by Scott O'Dell Sourcebooks, Inc Paperback 30 October 2009 from£10.78 | RRP: £7.99
• New York Cookbook by Molly O'Neill Workman Pub Co Hardcover 1 October 1992 from£23.74 | RRP: £18.95
• A Prayer for the Dying by Stewart O'Nan Henry Holt & Company Inc Hardcover 19 August 1999 from£21.58 | RRP: £15.99
• The Sword of Forebearance (Pelbar Cycle/Paul O. Williams, Bk 7) by Paul O. Williams Ballantine Books (Mm) Mass Market Paperback 1 September 1985 from£2.90 | RRP: £2.04
• Getting Well Again: A Step-By-Step Self-Help Guide to Overcoming Cancer for Patients and Their Families by O. Carl Simonton J P Tarcher Hardcover from£16.69 | RRP: £11.49
• Hugh Lane 1875-1915 by Robert O'Byrne The Lilliput Press Ltd Hardcover 7 November 2000 from£33.75 | RRP: £25
• Business Beyond the Box: Applying Your Mind for Breakthrough Results by John O'Keeffe Nicholas Brealey Publishing Hardcover 28 April 1998 from£12.15 | RRP: £16.99