The Mystery of the Deadly Double (Alfred Hitchcock and The Three Investigators, #28)

A terrifying ambush...
Before the boys could move, two men leapt out of the Mercedes and grabbed Jupiter. "If you want to see your friend again, don't follow us!" one of them shouted. Next moment they had thrust him into their car and were speeding down the highway...
Pete and Bob are baffled when Jupe is kidnapped. What could be the motive? Soon they realise that they are caught up in a deadly political struggle, the victims of a strange mistake. Jupiter Jones has a double...