The Lone Pine books are the best-known of Malcolm Saville's stories. They start in wartime Shropshire where a group of children become friends and uncover a group of enemy spies. As the series progresses, more children join the group and the action moves to different parts of England including Sussex, Dartmoor, Norfolk, Yorkshire and London. Although the war ends and time moves on, the children only get a couple of years older during the 35 years spanned by these stories.