How is this book unique? Font adjustments & biography included Unabridged (100% Original content) Illustrated About What Katy Did Next? by Susan Coolidge What Katy Did Next (1886) is a children's book by Sarah Chauncey Woolsey, working under the pen name Susan Coolidge. It follows the stories What Katy Did (1872), What Katy Did At School (1873) and tells the adventures of Katy Carr as she travels to Europe.