"We don't force them back," Juniper said. "People leave to be free. Sometimes they come back when ready. Sometimes they return what they can—a drawing, a list of places they won't name. Sometimes all that's left is the word." She handed Ava one of the papers. On it, in a handwriting both small and precise, was a list of things: "Rain, cassette hiss, key with no lock, the smell of old books." Then the last line: "If you find me, do not shout. Let the paper crane fly."