Bleak House definitely! Dickens is very underrated. I think people get put off by the length of his novels. Out of the ones I’ve read, BH is my favourite.
Rebyidd, not trying to argue here but only CS Lewis knows what his intentions were when writing Narnia. People can look into a book and read what they want into it, and since I don’t think Narnia is obliquely Christian-themed I wouldn’t be worried about my kids learning kefira from them. I certainly didn’t.