The Magician's House Quartet Series by William Corlett

William, Mary and Alice encounter a magician from another time who gives them magical powers and sets them on important tasks. The three children arrive at Golden House on their holidays, and they soon realize that there is something very mysterious about the ancient house.

Thirteen-year-old William Constant and his two younger sisters, Mary and Alice, have come to ancient, mysterious Golden House in Wales for the holidays. Their lives will never be the same once they enter the Magician's House — and discover their destiny. The Secret of Magic It's vacation again — time for William, Mary, and Alice to return to Golden House. They've made a solemn vow not to speak of anything that happened on their last visit to Uncle Jack's home... moreThirteen-year-old William Constant and his two younger sisters, Mary and Alice, have come to ancient, mysterious Golden House in Wales for the holidays. Their lives will never be the same once they enter the Magician's House — and discover their destiny. The Secret of Magic It's vacation again — time for William, Mary, and Alice to return to Golden House. They've made a solemn vow not to speak of anything that happened on their last visit to Uncle Jack's home. Was the magic real? It seems like a dream to William and Mary. Only Alice knows the secret of magic: believing. It is Alice who discovers the Dark and Dreadful Path, Alice who is irresistibly drawn to the ancient yew tree. And it is Alice who finds the door in the tree — leading to the secret hiding place of the Magician. It wasn't a dream!Soon they've become the Magician's students, led by the kestrel, the badgers, and the dog into the most perilous assignment of all.... less

It is summer and the long holidays at Golden House stretch before William, Mary and Alice Constant. Hot lazy days of swimming and picnics . . . until a new and terrible shadow steals over the valley and the children are plunged into a desperate adventure to save it from greedy developers. Once more they are pulled into the Magician's world and his eternal battle between good and evil... moreIt is summer and the long holidays at Golden House stretch before William, Mary and Alice Constant. Hot lazy days of swimming and picnics . . . until a new and terrible shadow steals over the valley and the children are plunged into a desperate adventure to save it from greedy developers. Once more they are pulled into the Magician's world and his eternal battle between good and evil. But without the Magician's trust and with evil Morden's powers now stronger than ever, they have a huge task on their hands. less

William, Mary, and Alice return to the ancient and mysterious Golden House in Wales for the holidays, but notice that Uncle Jack is on edge. He and Phoebe rarely speak, and baby Stephanie is always crying. Morden's evil rats are everywhere. Where is the Magician? Now, the three children face their most crucial and desperate adventure of all.