Extremely satisfying ending to the series!! I’m just so sad it’s over now. It was epic, but my only qualm was that the characters don’t talk like kids anymore. They all talk like Gandalf; I couldn’t tell characters apart just by their writing voices like I used to. I get that there was some major character development, and Seth especially had to grow up, but it would still be nice to have his quirky jokes and have them speak like their ages. 
BUT!

That was a very nitpicky thing; the twists and turns and mysteries of this book were masterful and I dearly love this series.