'Sparkling, brilliantly analysed treatise on the use of optics in art and one of the most important books on painting published in the last 100 years' - State magazine 'Hockney is a superb communicator, his prose as lithe and vivid as his own pencil line' - Guardian 'Hockney has utterly transformed the scope and basis of the debate... He is making us look at things afresh' - Martin Kemp, University of Oxford 'It will change our views of Western painting' - London Review of Books 'The most talked-about art book of the year' - Sunday Times