Everyone's favourite dragon, Zog, returns in this magical adventurous picture book from the number one bestselling author and illustrator of The Gruffalo, Smeds and the Smoos and Stick Man. 'Meet the Flying Doctors - a dragon, knight and girl. Their names are Gadabout the Great, and Zog, and Princess Pearl.' Princess Pearl, Sir Gadabout and their trusty 'air ambulance', Zog the dragon fly around tending a sunburnt mermaid, a distressed unicorn and a sneezy lion. But should princesses really be doctors? Pearl's uncle, the King, doesn't think so - until he himself falls ill, and only Pearl knows how to cure him.