I voted for LB without hesitation. It's the only title in the series I would call downright lame. That could be the title for countless other stories. (Having a unicorn on the cover doesn't help it stand out either)
I think "The Last King" would have been better. That title would make me curious. Why aren't there going to be anymore kings?
It can't really be the last king because the seven friends of Narnia were kings and queens there too. And there was King Frank and Queen Helen, not to mention the ultimate king, Alsan.
I can't decide. It comes down to PC and LB. LB because I hate the idea of Narnia ending and so have never been a fan of that book. I really don't know why I'm not a fan of PC's title. It's one of my favorite books in the series.
I'm going for the HHB on this one, only becasue it was not even close to the title that Lewis wanted! I read an interveiw with a close freind of his a while back. Lewis at first wanted the book to be called "Narnia and the North" (NN) then I forgot the other one. And, then we got HHB. Personally, I'm going with C.S. Lewis.
memento mori