More poetry followed, along with Rootabaga Stories (1922), a book of fanciful children's tales. That book prompted Sandburg's publisher, Alfred Harcourt, to suggest a biography of Abraham Lincoln for children. Sandburg researched and wrote for three years, producing not a children's book, but a two-volume biography for adults. His Abraham Lincoln: The Prairie Years, published in 1926, was Sandburg's first financial success. He moved to a new home on the Michigan dunes and devoted the next several years to completing four additional volumes, Abraham Lincoln: The War Years, for which he won the Pulitzer Prize in 1940. Sandburg continued his prolific writing, publishing more poems, a novel, Remembrance Rock , a second volume of folk songs, and an autobiography, Always the Young Strangers. In 1945 the Sandburgs moved with their herd of prize-winning goats and thousands of books to Flat Rock, North Carolina. Sandburg's Complete Poems won him a second Pulitzer Prize in 1951. Sandburg died at his North Carolina home July 22, 1967. His ashes were returned, as he had requested, to his Galesburg birthplace. In the small Carl Sandburg Park behind the house, his ashes were placed beneath Remembrance Rock, a red granite boulder. Ten years later the ashes of his wife were placed there.