Ah yes... I remember back to the hot summer of '76, lazing in my backyard - school holidays and all that. This book was in my hands from a.m. to evening. It was the first book I had read by Edmund Cooper and it made me hungry for more - though his other works never matched up to this novel for me. It tells a story with many themes. It tells the adventures of a group of teens growing up in a very strange London indeed. Queen Victoria is on the throne, her Prime Minister is Churchill and we are at war with jet fighters battling dirigibles across the shielded skyline! It is the twists and turns in this novel that make it Cooper's finest work.
Thirty years later, I still remember this work fondly and I highly recommend it to anyone wanting to try Edmund Cooper.
(I really wish his work could be reprinted - they are all competently crafted Sci Fi with a spark of originality).