This 1960 era police procedural holds up pretty well as the solving of crimes requires persistence, thoroughness, and knowledge of people's behaviour. The publishers unnecessarily warn that this is before mobile phones, DNA, and with very different social attitudes.
An activist who is trying to disrupt a fox hunt is found dead. Inspector Cole is called in to lessen the possible embarrassment to the local police because of he people who could be involved. He is assigned a fast tracked recruit for the same reason. They work their way through all the twists and turns and wrong conclusions to an answer only to have a further twist.