Longshot - Dick Francis

John Kendall knows how to survive. He's written six handbooks on the subject. How he wants to become a novelist - preferably without starving to death. But when cold and hunger set in, Kendal impulsively accepts an unlikely job. 

He is to research and write a biography of Tremayne Vickers, a famous racehorse trainer. Staying at Vickers' home in rural Berkshire, Kendall soon learns to like his host and friends, learns to ride racehorses, learns about murderers...

And how his own survival tips can become deadly traps...