The Scarecrow and His Servant By Philip Pullman

One night there was a thunderstorm. A tattered scarecrow stood in the wind and rain, taking no notice . . . until a bolt of lightning struck his turnip head. The scarecrow blinked with surprise and came to life.

So begins the story of the Scarecrow, a courteous but pea-brained fellow with grand ideas. He meets a boy, Jack, who becomes his faithful servant, and they set out to journey to Spring Valley together. Along the way there's no end of excitement - battle and shipwreck, brigands and tricksters - and it's up to Jack time after time to save the day.