Per Ardua ad Humour is a personal collection of humourous 'situations' experienced by Johnny Johnson over a period of more than thirty years service with the Royal Air Force. The stories have been wonderfully highlighted by 'Patch' his cartoonist. They originated from his very first days with the Air Force to his last days of service. Many anecdotes have to do with his profession as an Air Traffic Controller and also as an airborne radar 'Calibrator' operating worldwide between the United Kingdom and the Far East. Many of those who read this book will, I am sure, identify with some of the stories.