When Robert Keable's First World War novel Simon Called Peter was published, critics called it 'offensive', 'a libel' and reeking of 'drink and lust'. Scott Fitzgerald suggested it was 'utterly immoral' and referenced it in The Great Gatsby. The novel became a huge international best-seller, a Broadway play and the sequel made into a Hollywood movie. And it made its author an international celebrity. What critics did not know was that the novel, about a military chaplain and a young woman having an affair during the war, was autobiographical.

Utterly Immoral tells the remarkable true story of Robert Keable. He was an up-and-coming star of his Church. Raised in Croydon by evangelical parents he became increasingly high church while studying at Cambridge and, once ordained, he travelled to Zanzibar as a missionary. Following the outbreak of the First World War, he moved to Basutoland to work as a parish priest. He travelled to France as chaplain to the black labourers of the SANLC. It was during the war that he began to lose his faith, dispirited by the appallingly treatment of his men, the horrors of the war and the implications of his secret affair with the nineteen-year-old lorry driver, Jolie Buck. Having written Simon Called Peter he left the church, and his wife, and fled to Tahiti to live in Paul Gauguin's house. He lived the celebrity life in Tahiti, marrying a Tahitian princess, dubbed the 'Helen of Troy of Tahiti'.

The author, Robert Keable's grandson, has used letters, books, articles, interviews and a trip to Tahiti to produce a fascinating account of Robert Keable's life and the story of the success of Simon Called Peter.