Patricia Brennan Demuth is an American author best known for her children's books and biographies aimed at young readers. She has written numerous books in the "Who Was?" series, which includes biographical works on historical figures such as Albert Einstein, Helen Keller, and Mahatma Gandhi. Demuth's writing is characterized by its clear, accessible language and ability to present complex subjects in an engaging and informative manner suitable for children. Her work often includes illustrations, sidebars, and timelines that help readers better understand the life and significance of the subjects she covers. With a knack for making history and biographical content interesting for children, she has contributed to the education and inspiration of young readers.