This was a really great ending to a really great fantasy series. Two small nitpicks... First, there was too much traveling and not enough action. Second, I hate this current trope in YA of having the male protagonist have chapters set from his POV in the third book. It feels inconsistent to me. Also, it feels like the author is sick of writing from the main character's POV and that they're looking for a way around that. /rant 
 But! Elisa was awesome! And her character progression was so well-handled. I loved the Inviernos, too. Fun fact--Invierno is totally the Spanish word for winter. Nifty, right?