Man, that ending hit me like a ton of bricks and left me feeling kind of torn, honestly. I powered through the final book, 'The Wishing Spell' or wait, that's the first one—sorry, I mean 'Worlds Collide', in basically one sitting. Seeing Alex and Conner have to make that ultimate choice about where to live, and Alex deciding to stay in the Fairy Tale world while Conner goes back home... it felt right for their characters, but it was also just so sad. They went through all that together and then had to live apart. The whole final showdown with the Masked Man and the reveal about their dad was a bit rushed for my taste, but the emotional beats landed. The series wrapped up its big arc about family and stories really well, I think.
What I keep coming back to is that last library scene. Conner visiting the Land of Stories through the books, and Alex being there as a queen, both of them happy but separated by worlds. It's a bittersweet kind of happy ending, not a perfect one, which I appreciate more as an adult reader now. It acknowledges that growing up sometimes means your path diverges from the people you love, even if you still have that connection. I remember finishing the book and just staring at the wall for a minute. It's a satisfying conclusion for the twins' journey, even if part of me wishes they could have found a magic loophole to live in both places.