Aru Shah and the Nectar of Immortality

And just like that, Roshani Chokshi pulls the various plotlines together and ends the whole thing. The pacing, character development, plot, emotions, action, etc. finally hits just right. I read that Chokshi initially didn't plan on writing a fifth book, but ultimately did. Seems like that was the right choice. This series isn't gold, but it's got a diverse cast and tells some great stories. I liked this last book the best.