Turkish Delight is a very sweet, very addictive candy. Once tasting it a person will eat it until they die. And they will do anything… to obtain the candy. They will sell their soul and love ones to obtain Turkish Delight.
Queen Jadis gives some Turkis Delight to Edmund so that she might control him to do her dirty work – or anything she requests of him. In The Lion, the Witch and the Wardrobe, Edmund Pevensie receives the candy, Turkish Delight, from Queen Jadis, the White Witch. She uses his desire for the candy to make him do her bidding. She uses his desire for Turkish Delight to control him until Aslan's army recuses him from Queen Jadis, the White Witch in The Lion, the Witch and the Wardrobe.
So strong is his desire for the Turkish Delight, that Edmund Pevensie betrays his brother, Peter, and sisters, Susan and Lucy. He sneaks from Mr. & Mrs. Beaver's lodge to go to the evil Queen Jadis. He thinks she will give him more Turkish Delight… BUT …Unfortunately, Edmund does not receive any Turkish Delight from the queen. Instead, she throws him in a jail cell. There in that cell he meets Lucy's Mr. Tumnus, a faun.
The Chronicles of Narnia Books
Note: Narnia books are from my personal library.