Cloning is some of the most exciting science and one of the most keenly fought moral debates of our time. Perfect Copy is a uniquely accessible exploration this most vexed and pressing issue. In 1997 Ian Wilmut and his team announced that they had done what many thought to be impossible. They had cloned a mammal from an adult cell. This breakthrough prompted immediate calls for the new technology of mammalian cloning to be used on humans. Italian fertility specialist Severino Antinori hopes to use cloning 'within two years' to give 200 infertile couples the opportunity to at last become parents. Cloning may also solve, once and for all, the problem of rejection that bedevils transplant surgery. Perhaps it even holds the promise of eternal life. But plans to clone humans have triggered a storm of protest. Scientists including Wilmut, politicians from left and right, and theologians from almost all religions find the idea abhorrent. We cannot possibly decide who is right in this debate unless we have a good understanding of what a human clone is and how one would be created. Nicholas Agar unravels the science - and the ethics - of cloning and begins to show how we should approach this fantastically problematic area.