GCSE Core Science OCR Gateway Revision Guide - Higher (with online edition) by CGP Books
This book (with free Online Edition) is full of clear revision notes and diagrams for Higher Level OCR Gateway GCSE Core Science. It includes a section on 'How Science Works', loads of exam advice and revision summary questions. Everything's explained in straightforward language, with a touch of humour to keep things interesting. What's more, a free Online Edition of the whole book is included - perfect for revising on a PC, Mac or tablet device.