This book has some updates to the 1969 copy. Although it is out-of-date compared to today's information on the subject it is still a gem. It has a minimun amount of mathematics, therefore it can be understood by the layman to the undergraduate level. Anyone who has a fascination for this subject will find that this book is of value. It is a classic in my eyes.
This book includes and introduction to lightning on subjects such as thunderclouds, the steeped leader, the return stroke, the dart leader, discharges and other lightning forms.
There are some photographs as well. These range from early studies, the Boy Camera, and photographs from countries such as South Africa, the U.S., and some more recent photo's from Switzerland.
You will also learn about electric and magnetic field measurements, which includes field changes due to cloud to ground lightning, discharge lowering charge to earth.
There is some history in this book on theories; experimental techniques and the lightning spectroscopy; thunder and the discharge processes.