"Perhaps on some worlds!" It's a cheering thought, and probably even likely. "In mine they were mostly old buildings stuffed with whatever books the owner could afford. Ah, but there were the real libraries too, in Paris...the buildings more bound to gravity and physics as you'd know it, and no building in our world could have held so many books. But still enough books and enough floors to steal a man from the world for a full day if he wasn't careful, and the archivists didn't kick him out. "


He taps the cover of the bird book. "--And the books weren't so obviously spirited. But of course that's always the trick with books."