Geoff Stuart is an Australian designer, inventor and author having written a number of children's books, 'Secrets in Stone' - tracing Sydney's history as revealed through it stone architecture, 'Just 18' - a teenage guide to an adult world and 'Business' - tracing the extraordinary history of some of the world's greatest inventors, entrepreneurs, companies and brands. His career spans marketing, advertising, branding, design and business and Geoff has lived and worked in Australia, Asia, USA and Europe. Ideas, imagination, history and architecture are some of his passions.