Unnatural Death is a mystery novel written by Dorothy L. Sayers and published in 1927. The story is centered around the suspicious death of an elderly lady named Miss Agatha Dawson, who appeared to die of natural causes but had made a remark suggesting she may have been murdered. Lord Peter Wimsey, a wealthy amateur detective, becomes interested in the case and begins to investigate. As he delves deeper, he uncovers a series of previous suspicious deaths linked to the same suspect, a seemingly innocent nurse named Nurse Climpson. Wimsey must work quickly to gather evidence and prevent any further murders before it's too late. Along the way, he is assisted by his friend Inspector Parker, as well as the intrepid Miss Climpson herself. The novel explores themes of justice, morality, and the pursuit of truth, while also providing a complex and engaging mystery for readers to solve.