The Smoking Gun

"Suddenly a cry broke the spell. It sounded like the dreadful how of a dog, mortally wounded. But it was emitted by a human..."

When Ros Rabin's grandfather suffers a heart attack on Sports Day, everyone assumes he's died of natural causes. Everyone but Ros's brother, David.

But then David, too, is found murdered. What is the connection with the sinister Dearing Scientific Laboratories? And what of the "smoking gun" - the lethal poison which killed him?

Ros, and her boyfriend Kevin, have to discover the truth, before they become the next victims....