After Hurricane Katrina, the photographer Robert Polidori flew to New Orleans to document the devastation. In the wreckage he witnessed, and in her questions about what she saw in what he saw, Stephanie Bolster found the beginnings of a long poem. Those questions led to unexpected places; meanwhile, life kept pouring in. The ensuing book, Long Exposure, is Bolster’s fifth, a roaming, associative exploration of disasters and their ongoing aftermaths, sufferings large and small, and the vulnerability and value of our own lives. Incremental, unsettling, Long Exposure rushes to and through us.