<P>Frank X. Gaspar's collection of poems is haunted by the presence of mystics and visionaries: Mohammed, Buddha, St. Paul, Augustine, George Herbert, Emily Dickinson, Blake, Milton, Rilke. A Field Guide to the Heavens is punctuated with designs of science, the wondering and rapt observations of the sky made at the eyepiece of a backyard telescope. We come to know Gaspar's city streets, the neighbors and strangers that walk them, the wreckage of past lives, the ocean, the gardens, the orchards and alleys and parking lots, all spread out under the vast sky.</P>