The books in the Unlocking the Law series are a departure from traditional law texts and represent one view of a type of learning resource that the editors always felt is particularly useful to students. The success of the series and the fact that many of its features have been subsequently emulated in other publications must surely vindicate that view. The series editors would therefore like to thank the original publishers, Hodder Education, for their support in making the original project a successful reality. In particular we would like to thank Alexia Chan for showing great faith in the project and for her help in getting the series off the ground. We would also like to thank the current publisher Routledge for the warm enthusiasm it has shown in taking over the series. In this respect we must also thank Fiona Briden, Senior Publisher for the series for her commitment and enthusiasm towards the series and for her support.