This book is full of clear revision notes, detailed diagrams and practice questions for AS and A2 Chemistry. It covers all the AS and A2 topics for the OCR A exams, and it's packed with useful tips for doing well in your exams. There are practice questions on every topic including exam-style questions (answers are at the back). It's easy to read and revise from - everything's explained simply, in CGP's chatty, straightforward style.