Written by W. E. Johns
Copyright 1950
A collection of 7 short stories all dealing with Biggles and friends as part of the Special Air Police handling criminal investigations. The stories are:1. The Case of the Black Sheep2. The Case of the Visiting Sultan3. The Case of the Unregistered Operator4. The Case of the Wounded Agent5. The Case of the Brilliant Pupil6. The Case of the Murdered Apprentice7. The Case of the Stolen Aircraft