Hazel Richardson has achieved with How to Clone a Sheep something that many children's science writers fail at: making learning about science genuine fun. This cheap'n'cheerful paperback covers much ground, including the early ideas by the Ancient Greeks and Romans about inheritance, the discoveries and theories of Mendel and Darwin, the elucidation of the structure of DNA and the cloning of Dolly the sheep. No fact is presented in a dry style; the text is clear, funny and inventive, and credit must also go to the illustrator Andy Cooke, many of whose pictures are real rib-ticklers. Exciting projects, including making a model of DNA and cloning bacteria, plants, and frogs, are described for children to do at school or home. This book will definitely help children understand the basic concepts of genetics and cloning, which can only be a plus in a climate where many people throw their hands up in horror at their mention without knowing the facts. My one criticism is that I did, at times, want more details about individual scientists or discoveries. Perhaps Oxford University Press should consider publishing a larger, colour version with more information. However, How to Clone a Sheep makes an excellent read and should be, in my opinion, a compulsory book in all schools for young science students.