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• Computational Geometry in C (Cambridge Tracts in Theoretical Computer Science) by Joseph O'Rourke Cambridge University Press Paperback 29 March 1994 from£26.93 | RRP: £19.95
• A Crooked Field by Colm O'Gaora Picador Hardcover 26 March 1999 from£20.23 | RRP: £14.99
• Mad Lomasneys and Other Stories by Frank O'Connor Macmillan Paperback 6 March 1970 from£73.57 | RRP: £0.8
• Introduction to Counterpoint by R.O. Morris Oxford University Press Paperback 1 December 1984 from£9.38 | RRP: £6.95
• Theatre in Education (Unibooks) by John O'Toole Hodder Paperback 1 January 1977 from£3.98 | RRP: £2.95
• Twenty Years A-Growing (Oxford Paperbacks) by Maurice O'Sullivan Oxford Paperbacks Paperback 17 February 1983 from£N/A | RRP: £7.5
• Truelove (Aubrey-Maturin) by P O'Brian W. W. Norton & Co. Hardcover 15 June 1992 from£25.63 | RRP: £17.99
• How to Steal a Dog by Barbara O'Connor Farrar Straus Giroux Hardcover 20 March 2007 from£20.21 | RRP: £10.85
• Step into Reading Molly the Brave by Jane O'Connor Random House USA Inc Paperback 4 July 2003 from£6.73 | RRP: £2.71
• Focus on Advanced English: C.A.E.Practice Tests with Guidance (Focus on advanced English CAE) by Sue O'Connell Nelson ELT Hardcover 1 November 1993 from£13.36 | RRP: £9.9
• Happiness: The Thinking Person's Guide by Richard O'Connor Vermilion Paperback 7 May 2009 from£9.89 | RRP: £8.99
• Celtic Dawn: Portrait of the Irish Literary Renaissance by Ulick O'Connor H. Hamilton Hardcover 1 May 1984 from£17.48 | RRP: £14.5
• Basic Knowledge "O" Grade Physics by J.B.O. McNair R.Gibson Paperback 1 May 1971 from£0.65 | RRP: £3.2
• Edmund Burke: His Political Philosophy (Political Thinkers) by Frank O'Gorman Allen & Unwin Hardcover 13 September 1973 from£4.72 | RRP: £6.5
• Fancy Nancy: The Show Must Go on (I Can Read Fancy Nancy - Level 1) by Jane O'Connor HarperCollins Paperback 1 July 2009 from£7.03 | RRP: £2.76
• Be Near Me by Andrew O'Hagan Houghton Mifflin Harcourt (HMH) Hardcover 4 June 2007 from£17.62 | RRP: £16.63
• Chian Wine by Patrick O'Brian Collins Hardcover 8 July 1974 from£3.37 | RRP: £2.5
• Epicurus on Freedom by Tim O'Keefe Cambridge University Press Paperback 25 June 2009 from£36.00 | RRP: £14.99
• The Reverse of the Medal by Patrick O'Brian Harper Perennial Paperback 2 June 2008 from£8.09 | RRP: £7.99
• Z. for Zachariah by Robert C. O'Brien Imprint unknown Hardcover 1 January 1989 from£11.47 | RRP: £8.95
• Motion to Suppress by Perri O'Shaughnessy Delacorte Pr Hardcover 1 July 1995 from£21.62 | RRP: £15.21
• Killing Critics by Carol O'Connell Putnam Pub Group (T) Hardcover 1 June 1996 from£15.70 | RRP: £16.24
• Texas Trouble (Harlequin Super Romance) by Kathleen O'Brien Harlequin Mass Market Paperback 11 May 2010 from£6.95 | RRP: £3.81
• The Fourth Man by K. O. Dahl Minotaur Books Hardcover 18 March 2008 from£29.09 | RRP: £16.24
• Advanced Engineering Mathematics by Peter O'Neil Nelson Engineering Paperback 6 March 2006 from£87.75 | RRP: £53.99