This essential new edition is written by the experienced author-examiner team of Simon Green, Rob Lewis and Julia Willerton, and provides a wealth of expert support, practical activities, and exam skills guidance. This book is in-depth and focused on the needs of both the AS and the A Level. It has helpful hints throughout and has some excellent exam-focused content that can help students link theory and research studies to the requirements of the exam. It is one that, as a teacher, I will turn to first.