COME TO GRIEF, by Dick Francis
Halley, a risk-taker with a very high pain threshold (had to be; he was a steeplechase jockey, where pain and the risk of death or maiming was ever-present) is called to investigate the maiming of ponies. Halley quickly becomes convinced that one of England's most popular sports figures could be responsible, and knows he'll start a firestorm when he makes the accusation. But the evidence mounts and he's driven to act. But so are other people. No spoilers, jsut go ahead and read them all! It's a 4.