The history of the "Sleep" PDF and score is legendary in the choral world due to a major legal hurdle:
Before searching for the PDF, understanding the history of Sleep is essential. Originally, Whitacre set out to set Robert Frost’s poem “Stopping by Woods on a Snowy Evening” to music. After completing the draft, he sent it to the poet’s estate for permission. The estate refused. sleep+eric+whitacre+pdf