The Running Grave is a 2023 novel by J. K. Rowling, written under her Moustache de Plume, Robert Galbraith. It is the seventh book in her series about one-legged private detective Cormoran Strike.
The story is set in 2016. Strike and his partner, Robin Ellacott, are approached by one Sir Colin Edensor. Sir Colin's son, Will, has become ensnared in the grip of a suspicious cult, the Universal Humanitarian Church.