[The jest, unsurprisingly, went sailing over Byleth's head, as he seemingly gave Yuri's words some serious consideration, judging by the minute frown on his face.]

That is true. With a sufficient amount of books, these bags can become dangerous bludgeoning weapons at a push. But Kowloon is known for its dangerous entities... we'll just endeavour to be cautious and maintain awareness of our surroundings.