The stories in A Ghostly Gallery were written over a period of sixty years, the whole length of Joan Aiken's writing career; some appeared in her very first collections of what her father Conrad Aiken called "Twentieth century Fairy stories for the young of all ages."

Stories include A Roomful of Leaves, where a boy escapes an unbearable family and disappears into the Elizabethan past, and the luminously uplifting Watkyn Comma about a ghost mouse who rescues a lonely heroine. These stories are often inspired by dreams and myths and are written to comfort and console. Some appeared in anthologies, such as a Pan Ghost Book, or in her own collections for younger readers, which came out in England and America. As she moved away from overtly scary stories towards the end of her life, these are her gentler tales of mystery and imagination.

Two of the stories have not previously appeared in an Aiken collection. Dancing in the Air, and Lungewater