Terry Deary began his writing career with fiction for A&C Black. He is now author of over 200 fiction and non-fiction books, which have been published in 40 languages. His historical fiction for older children Tudor Terror has been praised as "a marvellous blend of fact and fiction" (School Librarian). His non-fiction has been consistently in the best-seller lists since 1994. His Horrible Histories celebrated their 15th anniversary in 2008, having sold over 25 million copies worldwide and been adapted as television series, theatre tours and museum exhibitions. Terry Deary was voted "Outstanding Children's Non-Fiction Author of the 20th Century" by Books for Keeps magazine.

Stories of the Second World War on the Home Front from the bestselling Terry Deary, author of the hugely successful Horrible Histories. In this retelling of an extraordinary true story, a pair of children realise that the odd strangers they see in their tiny Scottish village are German spies. Can the children alert the authorities or will the ruthless spies find them first?