"Cassie, look " Frieda cried suddenly. "One of the upstairs shutter is open " All three sisters, Frieda, Cassandra, and Gretchen, stared at the old, somewhat mysterious house at t he edge of the woods which had been deserted for more than twenty years. What's going on there now? Soon they will learn more. But why don't they want to tell anyone else about their experiences? This is a tale of three girls in Southern Germany discovering a refugee boy with a talent for playing the violin, and how their lives intertwine.

After her mother's bad accident and ensuing state of coma, Aurelia's not-very-sympathetic aunt comes to take care of her. They live in a village in view of a range of rocky hills. Often Aurelia looks up at these hills and wishes she could live there. One pile of them especially makes her think of a castle - her rock castle One day she gets up there, but it is not as she had imagined. Leander, who rescues her when she gets lost in the forest, brings her home to his mother, who gives her the help and encouragement she so badly needs.

"Don't you feel it? There are secrets in Orkney." When Isobel Jones and her best friend Emily arrive on the Orkney Islands for their holidays, little do they know what adventures await them. As the girls set out to find hidden treasure, they find themselves caught up in the mystery of the island of Rousay and the secret of its castle.