Gallowglass is a 1990 novel by the British writer Ruth Rendell, written under the name Barbara Vine.

At present, Nina lives in a heavily guarded residence with her husband and many servants.

Eventually, Joe's colourful stepsister, Tilly, is also dragged into the plot.

Most of the story is seen through Joe's eyes, but Paul Garnet, Nina's driver, also tells part of the tale.

The novel was adapted by the BBC as part of The Barbara Vine Mysteries.