Julia Donaldson and Axel Scheffler are at their sparkling best in this fabulously original sequel to the bestselling ZOG. Meet the Flying Doctors: Princess Pearl, Sir Gadabout and, of course, their trusty 'air ambulance', Zog the dragon, as they fly around the country, tending to a sunburnt mermaid, a distressed unicorn, and even a sneezy lion.