Real Wine - The Rediscovery of Natural Winemaking by Patrick Matthews (Mitchell Beazley, £14.99) is a timely book, since it addresses the most controversial issue in winemaking today. To what extent do you alter, modify and "correct" with technology and chemical adjustments the flavour of the grapes and wine which nature provides? (Some shaping, of course, is always necessary if wine is not to become vinegar.) Put most simply, natural winemakers allow their wines to be abnormal, singular, quiet or gross if that is what local conditions provide; whereas technological winemakers ensure that certain parameters are always met to maximise a wine's commercial appeal. Matthews has a curious, sparky, lightning-conductor of a mind and there is a mass of fascinating, if sometimes abstruse, research in this chunky little book; I wish, though, that he had been given another year or two to digest and shape this material into a more coherent and crafted argument. The book is also over-reliant on the Californian debate on these matters, whereas in many ways it is most interesting (and most relevant to British consumers) to bring the very different French (mystical-intuitive) and Australian (rational-pragmatic) views head to head. There is no whiff of winemaking controversy whatsoever in CRUSH - The New Australian Wine Book by Max Allen (Mitchell Beazley, £18.99); Allen is an unqualified supporter and enthusiast for the wines of his adopted country. His mission is to chart Australia's wine places and people, which he does with passionate intensity, getting closer to logging the intricacies of regionality in Australia than any author has yet done. The book appears to be almost unedited, though - it's a big breathless yomp through grape after grape, then region after region. In some ways I wish Allen had first written The Old Australian Wine Book, packed with clearly organised maps, headings, subheadings, producer entries, lengthy captions and a work-of-art index; the person-alised, matey, "great booze" style can weary, too. Persist, though, because there's much to learn in here - and magnificent portrait photographs by Adrian Lander.