The Atonement in the Line, the Witch in the Wardrobe?

Alister was listening to alister mc grath dida po cast m on thi yes, los podcast. A young woman asked him if he thought it perplexing that the atonement only applies to edmund. Alister: "I actually thught it was a very interesting question" He also said there is no theological thing going on in the background of this story.