Theodore J. Kooser is an American poet. He won the Pulitzer Prize in Poetry in 2005 for his book of poems Delights and Shadows. He served as Poet Laureate Consultant in Poetry to the Library of Congress from 2004 to 2006. He is the author of twelve full-length volumes of poetry and several books of nonfiction, and his work has appeared in many periodicals. Marshmallow Clouds is his first children's book which he co-authored with Connie Wanek and won the CLiPPA 2023.