From the bestselling author of Horrible Histories... Henri Giffard has devoted all his free time and money to inventing the first steam-driven hot air balloon. He's determined to make mankind's first ever-powered flight, and so in 1852 he sets off for Paris with just an urchin girl to help him. Thousands of people gather to watch the flight. Will the machine work when the weather changes - or will Henri's dream of flying become his downfall? Terry...