This book is written in British English not American English, however I was able to read it and understand it without much trouble. If you are into minimalist camping and considering using a bivy as your main shelter, this would be a good read.
To use a Bivy in place of a tent or hammock requires a certain mindset, or you will be miserable. You will be less miserable if you know what a bivy is and what it is not.
I greatly enjoyed this book and the toughness of people who choose a bivy over a luxury tent.