At the press conference, reporters bombarded Chen Xing with questions. "Can you explain how someone as young as you clinched the championship? We heard accusations from other contestants that you've been cheating? Is that true?" Chen Xing shoved the microphone that was pushed up to his nose away, his face filled with annoyance, "I want to state again very seriously that I haven't cheated!" As his words ended, Chen Xing waved his hand and summoned a behemoth that blotted out the sky, then jumped onto its back. "Damn it, I can't stand this anymore. Just because I raised them well, they say I cheated? My crocodile accidentally ate a demon, and that's cheating?"
libromancy means magic done via books. Like for example pulling pixie dust from Peter Pan or a wand from Harry Potter. Here he is just using it as an excuse to show his comprehension. I think it would be better to call it increased comprehension than libromancy