Bob Shaw 
Vertigo [EPUB ebook] 

Rob Hasson was an Air Patrolman, one of the best, until the day someone jumped him in mid-air and sent him hurtling into a fall that should have killed him. Now his mind, still tormented by memories of the shrieking air and rushing ground, protects his patched-together body by refusing to let him fly again. And what use to anyone is an Air Patrolman who’s afraid to fly? Rob Hasson thinks he’s a coward. No one could have foreseen the chain of events that would prove him wrong.