A first edition hardcover copy of The Motion of Light in Water by Samuel R. Delaney with separate book jacket. The jacket features an illustrated portrait of Delaney against a black and red cityscape background. The title is set in white type on top of blue, the subtitle is set in black type on top of yellow, and the author's name is set in black type on top of green. The book is an autobiography by Delaney about growing up as a gay African American man, being a science fiction writer, and the time he spent in an interracial marriage with Marilyn Hacker. The book consists of 302 pages.