Deadly Motive : DS Jack Mackinnon Crime Series Book 2 (DS Jack Mackinnon Crime Series‪)‬

A man is found poisoned by the deadly toxin aconite. A note found at the scene leads Detective Sergeant Jack Mackinnon to a University of Oxford laboratory, where staff and students are desperate to hide their association with the victim. As Mackinnon gets closer to the truth, he finds his own family could be at risk.