Having read the updated version of Trevor Davis' book, i feel the text best deals with the citizenship AS course.Having looked at a number of similiar texts around, i feel that this is the most comprehensive, accessible and widely sourced book of its genre on the market. The book could be furthur improved by online linkage, yet the subject matter is so indepth that this probably isnt required.
Overall this book provides the essential structure for anyone wanting to achieve a high grade in AS citizenship. This should be the AQA standard text. HIGHLY RECOMMENDED