This book is excellent! It is short, easy to read, accurate, informative, and challenging. It doesn't have the "fluff" of more modern American books, probably because of its British origin and its age, but it is every bit current and timeless. It is not just a discourse on fasting, but a guide to understanding the situations where fasting is appropriate, even necessary, and where it is not. It helps understand where fasting belongs in the overall message of the Bible. It also contains very useful information about the practical and physical concerns involved.