Religion

Religion (Christianity in particular) sometimes plays a part in the works by Agatha Christie. Miss Marple is often heard quoting the Bible. Vicars and other clergy are common in the stories.

Books from the Christian Bible

 * Book of Amos - Mr Rafiel quotes Amos 5:24 in a letter to Miss Marple in the novel Nemesis
 * Book of Judges - The short story The Wife of the Kenite and the radio play Butter in a Lordly Dish uses the theme of Jael and Sisera (Judg. 5:24-26)
 * Book of Revelation - The title of the novel The Pale Horse
 * Ecclesiastes - The book is quoted by characters in the novels Evil Under the Sun and Appointment with Death

Other religious texts

 * Book of Common Prayer - The title of the novel N or M? is taken from a catechism in the Book of Common Prayer.

Divorces
The fact that some religions don’t allow divorces is the reason for murder in several Christie stories.

Stories where religion is a central plot device

 * The Apples of the Hesperides - the religiosity of one of the characters is a major clue, and the idea of atonement is a dominant theme.
 * The House of Lurking Death - Hannah the maid makes many quotations from various books of the bible.
 * Star Over Bethlehem and other stories (short story collection)