Edge of the Cloud - K. M. Peyton

Christina and Will have escaped Flambards for London with their heads full of dreams, only to find a whole new set of problems. Not only the basic ones of work and a place to live, but Will's single-minded ambition to desing and pilot flying machines, which terrify Christina every time he leaves the ground. Will is certain he can become a success, but what price is he willing to pay for the glory? A Carnegie Medal winner in 1969, this novel is now reissued in a smaller format mass-market paperback.