Joan Aiken was born in Sussex in 1924. She was the daughter of the American poet, Conrad Aiken; her sister, Jane Aiken Hodge, is also a novelist. Before joining the 'family business' herself, Joan had a variety of jobs, including working for the BBC, the United Nations Information Centre and then as features editor for a short story magazine. Her first children's novel, The Kingdom of the Cave, was published in 1960.

Joan Aiken wrote over a hundred books for young readers and adults and is recognized as one of the classic authors of the twentieth century. Amanda Craig, writing in The Times, said, 'She was a consummate story-teller, one that each generation discovers anew.' Her best-known books are those in the James III saga, of which The Wolves of Willoughby Chase was the first title, published in 1962 and awarded the Lewis Carroll prize. Both that and Black Hearts in Battersea have been filmed. Her books are internationally acclaimed and she received the Edgar Allan Poe Award in the United States as well as the Guardian Award for Fiction in this country for The Whispering Mountain.

Joan Aiken was decorated with an MBE for her services to children's books. She died in 2004.

Celia Fremlin (1914-2009) was born in Kent and spent her childhood in Hertfordshire, before studying at Oxford (whilst working as a charwoman).

During World War Two, she served as an air-raid warden before becoming involved with the Mass Observation Project, collaborating on a study of women workers, War Factory. In 1942 she married Elia Goller, moved to Hampstead and had three children. In 1968, their youngest daughter committed suicide aged 19; a month later, her husband also killed himself. In the wake of these tragedies, Fremlin briefly relocated to Geneva.

In 1985, she married Leslie Minchin, with whom she lived until his death in 1999. Over four decades, Fremlin wrote sixteen celebrated novels, one book of poetry and three story collections. Her debut The Hours Before Dawnwon the Edgar Award in 1960.

Patricia Highsmith (1921-1995) was born in Fort Worth, Texas, and moved to New York when she was six, where she attended the Julia Richman High School and Barnard College. In her senior year she edited the college magazine, having decided at the age of sixteen to become a writer.

Her first novel, Strangers on a Train, was made into a classic film by Alfred Hitchcock in 1951. The Talented Mr Ripley, published in 1955, introduced the fascinating anti-hero Tom Ripley, and was made into an Oscar-winning film in 1999 by Anthony Minghella.

Graham Greene called Patricia Highsmith 'the poet of apprehension', saying that she 'created a world of her own - a world claustrophobic and irrational which we enter each time with a sense of personal danger' and The Times named her no.1 in their list of the greatest ever crime writers. Patricia Highsmith died in Locarno, Switzerland, in February 1995. Her last novel, Small g: A Summer Idyll, was published posthumously, the same year.

Donald E. Westlake is widely regarded as one of the great crime writers of the 20th Century. He won three Edgar Awards and was named a Grandmaster by the Mystery Writers of America.

Many of his books have been made into movies; Westlake also wrote the screenplay for "The Grifters," for which he received an Academy Award nomination.