This is a stimulating reference book for young readers covering a wide range of topics from art and animals to new technology. It is arranged thematically and illustrated with over 1500 photos, illustrations and diagrams. It features over 150 QR codes that allow readers to access carefully selected websites, downloadable pictures and quizzes - straight to a mobile phone or tablet. In addition, there are 750 internet links leading to a hand-picked selection of the best websites on a PC.