Asking the Wrong Questions: All We Know of Heaven: The Problem of Susan:
Andrew Rilstone has very nearly convinced me to forgive C.S. Lewis for what he did to Susan in The Last Battle.
Andrew's most recent obsession is misrepresentations of C.S. Lewis in the media. There's been a flurry of them recently as the release date for the new film ("starring New Zealand and a computer", according to Andrew) draws near: Lewis didn't want Narnia to be filmed, he hated Walt Disney's cartoons. But as usually happens in these cases, attention is inevitably drawn to Susan and her sad fate at the end of the series. Andrew, who knows a lot more (and cares a great deal more) about Lewis in general and Narnia in particular than I ever will, mercilessly filets the unthinking argument that Susan is left behind because of her sexual maturity.

Susan has lived in Narnia; she has reigned as Queen of Narnia during its golden age. She and Lucy have had an intimacy with Aslan that ever Peter does not experience(4). She comforted Aslan during his agony before going to the Stone Table, and he let her stroke his mane. After his resurrection, she celebrated with him and he let her ride on his back. However, she now denies that any of this ever happened, and instead seeks joy exclusively through beauty products. Pullman wants us to believe that "Susan became interested in lipstick, and is therefore thrown out of Narnia." I think Lewis is really saying "Susan ceased to love Narnia, and therefore, became a pathetic figure -- a woman of 50, trying to be a girl of 21, capable of loving nothing apart from lipstick."

The Last Battle is my least favorite Narnia book (although, in all honesty, I think that of the seven books, only The Lion, the Witch and the Wardrobe is a really good read). When I first read it, at 14 or 15, I had managed to miss the Christian undertones of the books. As I understand it, that's not an uncommon reaction, and to my mind this fact speaks well of Lewis' subtlety as a writer. With The Last Battle, however, Lewis abandons subtlety by the wayside.
[W]hen I think of Susan and her fate, my first reaction is always to pity her, not as a promising young woman who lost her path, but as a blameless character whose creator sacrificed her in favor of a cheap rhetorical victory.
There is no quality inherent to Susan that singles her out as the fallen Pevensie (and although Andrew makes a good case for the fact that when he writes that Susan "thinks of nothing but lipstick and nylons", Lewis is not being misogynistic, I do have to wonder if it ever occurred to him, at any point during The Last Battle's composition, that the fallen Pevensie might be one of the boys). He needs to cut the book's final scene, that joyous reunion in the new, "real" Narnia, with a bit of tragedy, one final opportunity to shake an admonishing finger at the readers and remind them that all this is theirs to lose if they, as Andrew puts it, become confused about what is real and what is not.


The Life and Opinions of Andrew Rilstone: Lipstick on My Scholar:
Can you see what has happened?
Lewis: "She's interested in nothing except nylons and lipstick and invitation."
Pullman: She's become far too interested in nylons and lipstick and invitations.
Rowling: She's lost to Narnia because she likes lipstick
Times: She's excluded from paradise because she likes nylons and lipsticks and invitations.
Independent: She's interested in evil snares such as nylons and lipsticks and invitations.
The sin of "liking nothing except lipstick..." has become the sin of liking it too much, which has become the sin of liking it at all.
that reads nicely BUT
Rowling and the two journalists have not understood Pullman's subtle point about Lewis's unconscious motivations. They've reproduced his comments without going back and checking the book. As a result "Susan is sent to hell as a punishment for her sexuality" has become one of those things which "everybody knows." mm not really ~ well Rowling's comment yes puts it that way but both journalists as quoted are talking about Pullman and seem to fairly state that:
To Pullman this has suggested that Lewis considered a girl reaching sexual maturity to be such a terrible thing...
Pullman has often spoken of his disgust at the exclusion of Susan from paradise at the end of the stories...
but anyway reading the CSL passage itself, given in this blog post, I do agree with what the blog author said as quoted by Wrong Qstns blog author above. she stopped loving Narnia, she stopped believing in it, and her version of adulthood follows from that.

"My sister Susan," answered Peter shortly and gravely, "Is no longer a friend of Narnia."
"Yes," said Eustace, "and whenever you've tried to get her to come and talk about Narnia or do anything about Narnia, she says 'What wonderful memories you have! Fancy you still thinking about all those funny games we used to play when we were children.' "
"Oh Susan!" said Jill "She's interested in nothing nowadays except nylons and lipstick and invitations. She always was a jolly sight too keen on being grow-up."

anyway good blog post, and this section 2: Being for The Benefit of Mr Pullman has this pity opening:
Phillip Pullman writes books. Some children seem to like them, which is nice; and so do some adults, which is okay. His books are better written than J.K Rowling's, although they don't sell nearly so many copies.
J.K Rowling's books have been turned into hugely successful movies, with the result that she is richer than the Queen. Phillip Pullman's books have been turned into very serious plays by the English National Theater, with the result that he is admired by the Times Literary Supplement and the Archbishop of Canterbury.
"His Dark Materials" has been compared with C.S Lewis's "Chronicles of Narnia" because it is a serious tale with literary and mythological allusions which uses symbolism to deal with profound religious questions. "Harry Potter" has been compared with the "Chronicles of Narnia" because there are seven books in the series.
When people ask Phillip Pullman what he thinks of C.S Lewis he always gives the same answer...
J.K Rowling doesn't dislike C.S Lewis and God nearly as much Phillip Pullman does. After all, her books outsell Lewis's and she's richer than God. But her comments about Narnia have an oddly familiar ring...