Everyone Is Jesus in Purgatory: Word of God says the book is hypothetical speculation on Christianity if Jesus existed in worlds that were quite different from ours. Of course, most people just thought it was a charming fairy tale.
Fair for Its Day: Lewis has taken a lot of flak for his Values Dissonance-laden statement that "battles are ugly when women fight." But other books do show that Susan and Lucy and Jill Pole are capable enough to hold their own in a battle. Even the U.S. Military didn't allow women in combat zones until the 1990s, and not in direct combat at all until 2013. (Technically, anyway; in practice, lack of clear battle zones meant women were fighting anyhow.) Men Are the Expendable Gender, after all.
First Installment Wins: The Lion, the Witch, and the Wardrobe is the best-known and most adapted book of the series.
Foe Yay: Some signs of it between Jadis and Edmund. Though it goes a little on the Memetic Molester territory since she's an immortal adult and Edmund ....10.
One Running Gag in the novel is that one should never shut oneself in a wardrobe, because if you do you'll be locked in. Edmund forgets this key piece of advice and does so anyway (although he is able to get out later). When the bloopers for The Movie came out, one of them was Skandar Keynes (who plays Edmund) shutting himself in the wardrobe, and consequently getting locked in.
When Edmund complains that it's raining outside, Susan mentions that they have a "wireless" inside to entertain them.
Tear Jerker: Aslan's death on the first read, and even on further readings since the scene is a symbol of Jesus' death and resurrection if you're familiar with the Bible.
It's even worse to watch in the 2005 movie, where we get to see the incredibly sad and scared look in his eyes as he's stabbed. Not to mention also seeing Susan and Lucy hidden away, watching the whole thing while sobbing their eyes out and then trying to clean up the body after.
In the 2005 movie, the girls find Mr. Tumnus's petrified body before they know Aslan can change him back. Poor Lucy's just as upset as you'd think, sobbing against Susan.
What an Idiot: In the 2005 film, Susan starts arguing with Peter over whether or not the huge, menacing wolf at the head of the Witch's Secret Police is really their enemy, even agreeing with Maugrim that Peter should drop the sword (that he was given by Father Christmas, of all people). Bonus points for taking this patently ridiculous stance while they're trying to cross a river that's melting under their feet.
Mr. Tumnus, particularly in the movie, where there's an added scene of him meeting Edmund in prison and, despite obviously having been hurt during his stay, is more concerned about Lucy's wellbeing than his own. Not to mention that his petrified body looks like he was either terrified or in a lot of pain, before being frozen.
Jerkass Woobie: Edmund, while the White Witch's prisoner. It's during this point that he actually redeems himself.