Waterstone's http://www.waterstones.com/
Mothersbliss Bookshop http://www.mothersbliss/books
Crosskeys Books http://www.crosskeysbooks.com
The London Bookshop http://www.londonbooks.co.uk/shop/
Sprint Bookshop http://www.sprintbooks.co.uk/
Penguin Books Ltd http://www.penguin.co.uk/
Karnac Books http://www.karnacbooks.com/
Amazon.co.uk http://www.amazon.co.uk/
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Computer Manuals http://www.compman.co.uk
BSP Gallery Bookshop old and rare books http://www.bspgallery.com.au