The world building and writing are good. At the point, having read this book 3 times and seen the show twice, I’m only reading the book for Alec Lightwood, and Simon and Izzy. I couldn’t care less about what happens to Jace and Clary (they’re story line is tedious, and is why the rating can’t be higher). But I can see the appeal in this book, as she does a good job of immersing the reader in a world that’s similar but different to our own.