A reference book for young readers covering a wide range of topics from art and animals to new technology. Arranged thematically and illustrated with over 1500 photos illustrations and diagrams. QR codes allow readers to access hundreds of carefully selected websites downloadable pictures and quizzes--straight to a mobile phone or tablet. The best of both worlds: a traditional reference book to keep and pore over plus the best and most up-to-date information on the web accessed via the Usborne Quicklinks site and QR codes. All internet links are thoroughly researched checked and monitored for quality and online safety.