Mr. Donald Fish was asked, at the end of the last war, to form and head a security service for B.O.A.C., which, along with other major airlines, was feeling the effects of a new type of crime -- international air crime. This book is the story of his troubles and exploits in preventing crime under seemingly impossible conditions, since often the legal venue of a crime committed in the air or in connection with international aircraft is difficult to establish -- in any case, local authorities don't want to be bothered with it. In this book, Fish makes an urgent plea both for the establishment of an international air police force and for international air law under which they could make arrests. In his work, Fish battled against every kind of smuggling: gold, diamonds, drugs, Swiss watches, and pilferage on an enormous scale. The one really unfortunate impression left by the book is that airline employees have in their numbers a persistent group of thieves, for in case after case, it was airline employees who were either themselves the thieves or were conniving with thieves. Travelling readers will be warned.