Killer Chemistry: Bethany Knox Private Investigator #8 (Paperback) (ISBN-13: 9798838065704)

But we Knoxes can't merely face our fears. Oh, no. We antagonize them.

When nine vials are stolen from Nigel Essex's lab, and six people are poisoned in twelve hours, red-headed Private Investigator Bethany Knox is called in to help track down the killers.
But is it a blast from her past, a competitor of Nigel's, or a friend of Nigel's that's behind the murders?
It's a race against time to find them before they strike again.