This book is available excellent summary of the Canadian contribution to science abs technology during the second world War. It covers everything from the major players, the projects (biological and chemical weapons, radar, proximity fuses, the atomic bomb etc) and the key locations in Canada. It also covers the attitude Canada had regarding using science for Warfare and how it should be shared with our allies. If you have an interest in history, science, Warfare, chemical and biological weapons or anything like that I highly recommend this book.