Poet Robert Hass is a Pulitzer Prize and National Book Award winner for poetry. He served as Poet Laureate of the United States from 1995 to 1997. Hass is the author of several books of poetry and critical essays including Time and Materials: Poems 1997-2005, The Apple Trees at Olema: New and Selected Poems, Now and Then: The Poet's Choice Columns, 1997-2000, and What Light Can Do: Essays on Art, Imagination, and the Natural World.