The poison
It was a vicious, calculated murder using the deadly toxin aconite.
The victim
Rich and powerful, John Weston had plenty of enemies, but DS Mackinnon and the Major Investigation Team have to find out who hated him enough to subject him to such an excruciating death.
The suspects
Even when the source of the poison has been tracked down to a laboratory at the University of Oxford, the deadly threat remains. The staff and students at the university all seem to have something to hide.
The arrest
After an arrest is made, his colleagues believe the case is all but closed but Mackinnon's nightmare is only just beginning.
(This book was the first book written in this series. However, the author wrote a prequel and they have been renumbered.)