I am reading Barton Zwiebach's 'A First Course in String Theory'. I expect I will finish up in about a month. Not that I understand it that well. I will put it aside and perhaps read it again in a couple of years. I took a peek at the book 'String Theory in a Nutshell' by Elias Kiritsis and realized how little I absorbed on my first reading, even chapter 1 of that book is beyond me. Professor Zwiebach's book was written for Sophomores at MIT and that's why I was able to read it at all. I wonder if there is a book on Loop Quantum Gravity that is aimed toward beginners like me.