Without Trace (Rev. and updated ed)

In the chilly half-light of dawn a bizarre Pierrot figure waits in the shadows of a deserted stretch of motorway.

The costumed hitchhiker's victim is a passing motorist.

The murder is cold-blooded, brutal, without motive. Doctors at the local hospital Tim and Daisy Sherringham are blissfully happy.

This is story of the perfect couple. When an emergency call rouses Tim early one morning, he vanishes on the way from their flat to the hospital. And Daisy is plunged into a nightmare of terror and doubt...The driver watched, transfixed as the blade moved slowly, inexorably towards him.

His hands flew upwards in a desperate attempt to wrest the weapon from the Pierrot's hands, but the defence was too weak, too late.

Before the driver's fingers even touched the knife, they fell limply, landing with a dull thud on the leather-gloved steering wheel.