In the Welsh hills Will Stanton, youngest of the immortal Old Ones, joins forces with Merriman, Bran, and the mortal Drew children in a quest through space and time against the powers of evil known as the Dark.
While spending the summer in an old stone house in Wales, fourteen-year-old Cristyn comes to terms with the death of her mother while satisfying the request of a thirteenth-century princess.
While on vacation, the eccentric and talented Bagthorpe family tries to contact the ghosts of their reputedly haunted house, pursues Cousin Daisy's elusive goat, and in general stirs up the quiet Welsh countryside.
Relates what happens to three American children, unwillingly transplanted to Wales for one year, when one of them finds an ancient harp-tuning key that takes him back to the time of the great sixth-century bard Taliesin.
Gifts from Gwyn's grandmother on his tenth birthday open up a whole new world to him, as he discovers he has magical powers that help him heal the breach with his father that has existed ever since his sister's mysterious disappearance four years before.
Matt feels a connection with a boy his age who was killed in an accident. Robbo and Tig blame an old man for the accident and persuade Matt to join them in punishing the man. Then the confused man mistakes Matt for another lost boy and Matt isn't sure what to do.
In a dismal Wales of the future, with few jobs and fewer resources, a group of destitute, jobless young people becomes involved with a rich girl whose life is impoverished in spite of her material comforts.
