In a riveting psychological thriller, Mary Higgins Clark takes the reader deep into the mysteries of the human mind, where memories may be the most dangerous things of all. At the center of her novel is Kay Lansing, who has grown up in Englewood, New Jersey, daughter of the landscaper to the wealthy and powerful Carrington family. Their mansion -- a historic seventeenth-century manor house transported stone by stone from Wales in 1848 -- has a hidden...