But Don't Deliver Us from Evil
From The Art and Popular Culture Encyclopedia
- "Anne and Lore are two barely pubescent teens who attend a Catholic Boarding school. While seeming sweet, well behaved, and innocent from all appearances, the two have actually devoted themselves to Satan. While they are at school, the two intentionally 'sin' as often as possible without getting caught. They steal clothing and religious reliquaries in order to use in future Satanic rituals, the confess sins which they haven't committed, they spy on the nuns, and they read transgressive literature [Les Chants de Maldoror] under their covers once everybody else is asleep. Their life at the boarding school is a constant joke to them, and they giggle at everybody else's misfortunes and the fact they are getting away with so much sin. Once summer break comes, their activities begin to get a little more serious." 
The story of the Parker-Hulme Murder was loosely adapted into the French film Mais ne nous délivrez pas du mal (Don't Deliver Us from Evil) and more faithfully into Peter Jackson's Oscar-nominated film, Heavenly Creatures. Perry's identity was only uncovered due to publicity surrounding the latter film. The case was also
fictionalised in 1958 as "The Evil Friendship" by Vin Packer (aka M.E. Kerr).