A terrifying encounter with a strange man in a deserted hut on the gloomy Scottish hills of Kidillin hurtles Sandy, Jeannie and their two London cousins into a whirlwind race against time in the search for the answer to the man's deadly secret....
Orphan Dick is delighted to get a job working with the dogs in Mr Ravelini's circus. Of course, nothing will go wrong - why should it? But lazy, spiteful Larry has other ideas, and poor Dick soon finds himself in a lot of trouble....
People say that funny lights have been seen at the old abandoned Cliff Castle. Of course, as soon as Peter, Pam and their cousin Brock hear this they are determined to solve the mystery even though it means pitting their wits against the unknown enem...
Luckily for Michael and Janet, they soon settle in their new boarding school and start to have a lovely time getting up to all sorts of mischief with their new friends. But who is the mystery boy Hugh, and why does everyone avoid him?...
Hilary, Frances, Alec, and their friend Ben are happily playing at smuggling when suddenly they are catapulted into a very real adventure with real smugglers and desperate danger. Can they solve the mystery before it's too late?...