Tokyo Heist ≤ City of Heavenly Fire?

I just acquired City of Heavenly Fire by Cassandra Clare. When I say "just acquired" I literally mean I got this book about 2 hours ago. It's....so.....pretty. AND THE DUST JACKET?????? Anyway, I'm not sure whether I'm going to put down Tokyo Heist and start reading it, or if I'm going to wait. I THINK I'm going to wait. Honestly, CoHF is a BRICK of a book and I'm not sure I want to carry it around school with me; especially since I probably won't get to read it much due to finals and studying for finals within my classes. //sigh. Haha, anyway, that is all at the moment. :3