Called to Duty 3: The Shipping Problem

Book Three in 'Called To Duty' - being The Adventures of Sean Piper.
Young Sean finds evidence of an Arab plot to blow up the world's great ports - and takes action to stop them. This action involves parachuting into the midst of an Arab ship and shooting the guilty before they can blow it up! To make matters more interesting, Sean finds a girl - a real girl. What he does is, itself, worth a read.