GoT/ASOIAF: The Prince of Scrolls

English is not my first language. Prince Jaehaerys, third son of the Mad King, returns to the capital at the command of his brother, King Rhaegar. Whispers call him "the prince of scrolls"—a young man with a passion for maesters and knowledge. Now, he must take the hand of Princess Daenerys in marriage, a union that promises castle and gold. But what reason does he have to refuse when his own nephew, Prince Daemon, seeks his death? Will he allow his nephew to claim victory? And why does one dragon fear the wrath of another? “If marrying my sister grants me the means to achieve my goals, I will not hesitate to fight—not even against the one said to be equal to Ser Barristan the Bold.” “And what goal is that?”