Greenwitch by Susan Cooper

The Dark is Rising saga continues bringing the protagonists of the first two books (Over Sea, Under Stone, The Dark is Rising) together. The Drew Children are dismayed when the ancient grail they discovered on holiday in Trewissick is stolen. They are invited to go back to the town on the Cornwall coast for the spring holiday with their Great-Uncle Merry. Joining them is Will Stanton, the old one from the second book. During their visit, the locals create a Greenwitch--a sculputure made from greens and twigs that is given to the sea. Searching for the missing grail and the manuscript that will unlock its secrets becomes intertwined with the mystical Greenwitch setting the stage for the fourth book. The audiobook is well-read by Alex Jennings, who easily switches between American, and a variety of English accents for the characters. Greenwitch by Susan Cooper. Listening Library, 2001.