I'm reviewing Blackout and All Clear together because they are one story split in two due to the length. I loved these books because the characters are so well developed and because there is so much fascinating information about England during WW2. At times the characters become a little confusing because so many of them are time travellers taking on fake identities with multiple names, but in the end everything comes together in an exciting way. These books are great for anyone who wants to dive deep into another world and stay there for a long time. If you decide to read one be prepared to read them both. I've rated both these with five stars.
