This bestselling all-in-one CGP book has been fully updated for the new 'Grade 9-1' Higher Level GCSE Maths courses! Every topic is clearly explained in CGP's informal, straightforward style, with plenty of tips and worked examples. Each mini-section is rounded off with a quick warm-up test and a selection of exam-style questions - and at the end of the book, there's a full set of practice exam papers. And finally, answers to the exam-style questions and practice exams are included at the back of the book!