I have some months in my hand before i head to graduate school. I would like to learn and strengthen my grasp on mathematical physics. I would like to do high energy physics (not necessarily just string theory but other approaches to quantum gravity as well) in the future. I could get my hands on a copy of nakahara and thus the question. If there were any other more suitable book to learn this subject i would be grateful for your recommendation.
If anyone has worked with this book, I would like to know the important topics present here typically covered in a graduate school in a semester or two. Thank you :)