Break In by Dick Francis

Family ties mean trouble, chains and fatal obligations. And when steeplechase jockey Kit Fielding comes to the aid of his twin sister and her husband, Bobby Allardeck, even death threatens.

A vicious newspaper campaign jeopardizes Bobby's career as a racehorse trainer. Putting behind him the age-old Allardeck-Fielding feud, Kit tries to find out who is behind it all. Combining his investigations with riding winners for the Princess - whose beautiful niece becomes more than a friend - he makes some startling discoveries.

Caught up in the intrigue are powerful people who think a jockey should mind his own business and are prepared to use violence to make sure he does...