During WW2, the Royal Air Force 100 Group provided electronic warfare support for the nightly British bombing raids over occupied Europe. This book is something of a history of the group and it's operations. I say something of a history because really only part of the book is a history of the operations, and it's rather dull. The rest of the book is composed of numerous diagrams and drawings of radio equipment, antenna installations, maps, and all sorts of illustrations that would be very much at home in a technical manual. This is most definitely NOT a book for someone looking for some exciting WW2 "war in the air" action. It is a serious, scholarly, technical look at the functions of the group. Even then, the book is not for the faint of heart. If you really, really want to learn more about WW2 airborne electronic warfare then it would be worth your time. Still, it is about the only really in-depth book I've found on this particular subject.