The Motion of Light in Water: Sex and Science Fiction Writing in the East Village, is the autobiography of the science fiction author Samuel R. Delany in which he recounts his experiences growing up as a gay African American man, as well as some of his time in an interracial and open marriage with Marilyn Hacker. It describes encounters with Albert Einstein, Bob Dylan, Stokely Carmichael and Stormé DeLarverie, a dinner with W. H. Auden, and a phone call to James Baldwin.