Dr. Marjorie Boulton is an author and poet, published in both English and Esperanto. She has also written short plays and short stories, and is the author of Zamenhof: Creator of Esperanto, a biography of L. L. Zamenhof.

She is perhaps best known as the author of a series of critical guides, The Anatomy… series. She lives in Oxford and is president of the international Esperanto organisation Kat-amikaro, and a member of the Esperanto Academy.