Joseph, you bring up an interesting point about what order in which to read the Chronicles. I am a firm advocate of the publication order rather than the chronological order. I think the impact of the original story (The Lion, the Witch, and the Wardrobe) has a greater literary impact on the unfolding structure of the remaining stories. I feel the same way about watching Star Wars in publication order, for what it’s worth, for the similar reasons. All of this to say, The Silver Chair is the fourth volume in publication order. Now, there’s nothing wrong with reading them in a different order, and Lewis himself affirms a young reader’s question to this point. Glad you are reading the books with your children!