Basically, I'm a Physics/Math MSc student. Currently strengthening my background in Diff. Geo., QFT, GR. I feel like I should start reading some research papers on Quantum Gravity but I do not know where to start. What papers should I start with? I need papers that are accessible to 2nd year postgrads, but that also give a glimpse of the frontier. Maybe this is asking too much though. But at the very least I search for research papers that give an good introduction to Quantum Gravity topics, either to just one approach or an overview of all.