Castaway is a 1983 autobiographical book by Lucy Irvine about her year on the Australian tropical Torres Strait island of Tuin, having answered a want ad from writer Gerald Kingsland seeking a "wife" for a year in 1982. It was published by Victor Gollancz Ltd.. Irvine stated she longed for a “major personal challenge”. She also acknowledged she was taking chances, but as she was neither in a relationship nor had children, she felt it was worth taking. Her book was the basis of the 1986 film Castaway, starring Oliver Reed as Gerald Kingsland and Amanda Donohoe as Irvine.
In her book, Irvine starts with the somewhat odd circumstances of this collaboration, in which she addresses Kingsland’s ad for a “wife to live on a lonely island for a year”. In that year (1982), Irvine was 25, and Kingsland 49. After being formally married — Tuin Island is part of Queensland, and the authorities would have never let them go without marrying first — and Irvine has an IUD implanted to prevent pregnancy, Irvine and Kingsland try to adapt, making the best out of a beautiful but hostile environment with treacherous flora and fauna. Slowly but surely, an intense love-hate relationship develops between the two, as Irvine is much more strict and disciplined than the laid-back Kingsland. Kingsland also makes clear he desires the blonde, slender Irvine, but much to his chagrin, she refuses his advances. However, as both are mutually dependent on each other, and both are also constantly hungry, the tension remains in check.
Matters grow worse when Kingsland’s legs become infested with ulcers – it turns out he is allergic to the shark they are regularly eating – and the two are visited by two male naval postal officers who drop supplies. When Irvine flirts with them, and acknowledges being sexually attracted by them, Kingsland is eaten up with jealousy. However, when she eats poisoned beans, he also saves her life, which earns her respect. But things grow from bad to worse when a bad drought comes over Tuin. Having no means of communication – the antenna of their CB radio set is missing — the two nearly starve to death. Irvine has serious abdominal problems and fears she is pregnant, which would be her doom in her weakened state.