Sleeping Murder is the 77th volume in The Agatha Christie Collection, published in 2003 by Harper Collins as part of a limited edition of 1000 copies worldwide. The story follows Gwenda, who moves into her new home only to find that modernizing it has brought up its dark past. Despite her efforts, she experiences an unsettling sense of terror every time she ascends the stairs. Desperate for relief, Gwenda seeks help from Miss Marple, the renowned amateur detective. Together, they uncover a ‘perfect’ crime that was committed many years ago, delving into the mysterious history of the house to solve this chilling mystery.