Lord Zuko is curious about the book and the picture he glimpsed on its pages. But given how quickly she takes it from him and shuts it, he realises that it must be private to her, for whatever reason, and decides not to pry. It isn't his place to intrude.

"You're welcome," he says, smiling warmly. "Sometimes solving problems becomes easier if you can see things from the perspective of the other person. ... Or spirit, as the case may be."