There's a book between his fingers when Thor arrives. He's reclining on his bed lazily, enjoying his few moments of free time while lazily flipping through the pages. The knock doesn't come as a surprise until he calls and Thor enters. He lowers his book and gives him a curious look that says "since when?"

"You've made yourself at home. Come to borrow a few books?" he says with a hint of a smile. From the looks of it, Thor definitely isn't here to take interest in Loki's vast library.