"The Lord of Song has representatives throughout the Library who will assist visitors, and one of Deneir's most prominent followers, Thomas Bookbinder, works within the library. The Lord of Song rarely appears in physical form, but he may have a body at certain times, yes."

"I see. So they would be library assistants. You're just a guard? Do you get tired of it? Are you even the sort of thing that gets tired? My apologies if I'm being intrusive, but my plane knew nothing of this one, you see." She smiles.

"I do not take offense. We do not tire, by our nature, but I will sometimes choose to pursue another task, and another will take my place as a guard."

"I see." She doesn't, really. That's just the polite way to stop asking questions. "Thank you for your guidance. If you could point the way to the library entrance I will stop taking up your time."

Instead of pointing, he starts to fly.

This way.

She begins to see a tall and thick tree rising in the distance. Approaching even closer, it becomes clear that there are stairs and little structures built along the trunk and branches. She can see at least dozen entrances in just this visible part of the tree, but she can see colors further up in the canopy that indicate there might be more architecture up there.

Interesting.

...She wants to go flying now. But it's a few hours' commitment to make the drastic changes necessary for that. Plus, calorie-burning. Maybe later.

She approaches and enters the big tree.

Inside, she sees books in bookshelves, lining the walls of the trunk. They continue, rising into the shadows of the tree's trunk above. Nearby, she can see three or four other people perusing the shelves, as well as a muscular man wearing a loincloth and no shirt, and with large feather wings extending from his back, He stands vigil as the others walk around the Library of All Knowledge.

Besides books, where an ordinary library might have lamps, this place has glowing, whispering orbs whose colors gradually cycle through the entire visible spectrum.