It's late in the evening, the drink has been flowing, and the conversation veers towards the weird. Is telepathy possible? Does astrology work? You know the kind of stuff. Cue the ritual slanging match between the wide-eyed credulist ("Well, it works for me") and the sceptic ("There's not a shred of scientific evidence"). Those who loathe such exchanges because of their sterile predictability now have a powerful antidote in this authoritative and accessible review of the state of scientific research into paranormal phenomena, based on a special issue of the `Journal of Consciousness Studies'. Almost all of the pieces are written by university academics with a track record of peer-reviewed research, and they cover paranormal phenomena thought by some to cast light on human consciousness, primarily telepathy (communication between minds), psychokinesis (affecting objects with the mind) and astrology (celestial effects on the mind). `Psi Wars' begins with a look at the sheer strangeness of paranormal phenomena and their implications. Then lead editor James Alcock of the University of Toronto argues cogently for scepticism based on evidence rather than ignorance. And as the bulk of the book shows, the evidence is far more extensive than you might think. Furthermore, some of it, notably in studies of telepathy, is strongly positive. Far from being the flaky obsession of nutcases, paranormal phenomena emerge as a valuable test bed for techniques whose reliability too often goes unquestioned. Anyone seeking something more sophisticated than the usual mud-slinging should buy this book. Robert Matthews is science correspondent of The Sunday Telegraph http://www.newscientist.com/opinion/opbooks.jsp?id=ns24122 -------------------------------------------------- FURTHER REFERENCES GO - "search perceptions" - in SEARCH-ENGINE file-ID www.perceptions.couk.com/fanskep.txt