The pleasure and power of stories lies in their ability to create coherent and believable worlds.This is achieved by the play of narrativity-the units of story: frame, events, characters,plot, space, authority, etc. A story is contingent upon a reader who participates and believesin the possible world created in the story. We can enter the various spaces and times of stories-myth, natural history, magic realism, etc.-only to the extent that we let their conventions determine what we look for and do in them.