In Dean Young’s sprawling and subversive first book of prose on poetry, imagination swerves into primitivism and surrealism and finally toward empathy. How can recklessness guide the poet, the artist, and the reader into art, and how can it excite in us a sort of wild receptivity, beyond craft? “Poetry is not a discipline,” Young writes. “It is a hunger, a revolt, a drive, a mash note, a fright, a tantrum, a grief, a hoax, a debacle, an application, an affect . . .”