"Whip Hand" by Dick Francis [UNABRIDGED AUDIOBOOK WITH TEXT]
Despite the fact that he thinks she's overreacting, ex-jockey turned detective Sid Halley agrees to keep an eye on an old friend's prize race horse before a big race, at the request of his buddy's wife. Winner of the 1980 Edgar Award.
Narrated by Simon Prebble

Reuploaded Thanks to Eugenius