"The war opened the world up to us. Not one of us was ever the same after that first summer." Mez Blume, author of the celebrated Katie Watson Mysteries in Time series, delivers a new classic for all ages. The story of the Briscoes - an ordinary British family who face the threat of German Invasion and rise to extraordinary acts of bravery - threads together the stories of real-life wartime families (including children) who joined the secret Special Duties Branch. Young readers' hearts will race as they join Ivy Briscoe, Teddy Woodall, and the 'Imps' (the Special Operation Cadet Kids) on their incredible adventures as part of the British Resistance. With characters who jump off the page, this book is as rich with humour and heart as it is with history.