Fans of Hejinian, a difficult-to-categorize cornerstone of the contemporary American experimental writing scene, have a lot of book to look forward to. Her latest is a doorstopper, a kind of impractical almanac of avant-garde poetry: It won't tell you when it's going to rain, but it will tell you, for instance, that "there were seven clouds. They were quite distinct from each other, and each bore its own rain." Hejinian sets this jumble of poems, prose fables and writings that don't fit