Michael Cunningham's luminous, compassionate new novel begins with a vision. It's November 2004. Barrett Meeks, having lost love yet again, is walking through Central Park when he is suddenly and inexplicably inspired to look up at the sky, where he sees a pale, translucent light that seems to regard him in a distinctly godlike way. Although Barrett doesn't believe in visions - or in god, for that matter - he can't deny what he's seen. At the same time, in the not-quite-gentrified Bushwick neighborhood of Brooklyn, Beth, who's engaged to Barrett's older brother ,Tyler, is dying of colon cancer. Beth, Tyler, and Barrett have cobbled together a more or less happy home. Tyler, a struggling musician with a drug problem, is trying and failing to write a wedding song for his wife-to-be - something that will be not merely a sentimental ballad but an enduring expression of eternal love. Barrett, haunted by the light, turns unexpectedly to religion. Tyler grows increasingly convinced that only drugs can release his deepest creative powers.