For Kicks by Dick Francis, Киев

Daniel Roke, Australian who established a stud farm to raise orphaned siblings, accepts undercover stable lad job from the Earl of October, investigating steeplechase doping in England. At least ten horses win adrenalin-high stimulated, but regular lab tests show nothing. Gorgeous October daughters distract, detract, and fatally endanger. Tension builds into an explosive fight to the death.