Link makes a soft, noise of acknowledgement - one that conveys a sense of, 'oh, I've seen that kind of book'. Zelda has quite a few of them. He doesn't have any here, though. But if Kanna likes information on different flowers...

Grabbing his Purah Pad, Link opens it up to the Compendium. There, Kanna will see an array of thumbnails showing images of different flowers and herbs. One of them is the white-and-blue flower that Link has decorated his dorm room with.