Secret Seven Bind Up (books 7-9) by Enid Blyton
Three more mysteries for the Secret Seven to solve!Secret Seven Win ThroughThe Seven have a fantastic new hiding-place. But someone else is using it at night - and it's Jack's little sister Susie who helps them catch the intruder.Three Cheers, Secret SevenWho is hiding in the abandoned house When Peter and Jack search for their lost model aeroplane, they see a gas-fire alight in one of the rooms - and realise the house isn't empty after all ...Secret Seven MysteryA girl runs away from home - and it's up to the Seven to find her! Jack's little sister Susie is up to her usual tricks - but she can't put the Seven off the trail of clues!