Lillian Rosanoff Lieber (July 26, 1886 in Nicolaiev, Russian Empire - July 11, 1986 in Queens, New York) was a Russian-American mathematician and popular author. She often teamed up with her illustrator husband, Hugh Gray Lieber, to produce works. Life and career Early life and education Lieber was one of four children of Abraham H. and Clara (Bercinskaya) Rosanoff. Her brothers were Denver publisher Joseph Rosenberg, psychiatrist Aaron Rosanoff, and chemist Martin André Rosanoff. Aaron and Martin changed their names to sound more Russian, less Jewish. Lieber moved to the US with her family in 1891. She received her A.B. from Barnard College in 1908, her M.A. from Columbia University in 1911, and her Ph.D. (in chemistry) from Clark University in 1914, under Martin's direction; at Clark, Solomon Lefschetz was a classmate. She married Hugh Gray Lieber on October 27, 1926. Career After teaching at Hunter College from 1908 to 1910, and in the New York City high school system (1910-1912, 1914-1915), she became a Research Fellow at Bryn Mawr College from 1915 to 1917; she then went on to teach at Wells College from 1917 to 1918 as Instructor of Physics (also acting as head of the physics department), and at the Connecticut College for Women (1918 to 1920). She joined the mathematics department at Long Island University (LIU) in Brooklyn, New York (LIU Brooklyn) in 1934, became department chair in 1945 (taking over from Hugh when he became Professor, and Chair, of Art at LIU ), and was made a full professor in 1947, until her retirement in 1954; she was appointed director of LIU's Galois Institute of Mathematics (later the Galois Institute of Mathematics and Art) (named for Évariste Galois) in 1934. Over her career she published some 17 books, which were written in a unique, free-verse style and illustrated with whimsical line drawings by her husband. Her highly accessible writings were praised by no less than Albert Einstein, Cassius Jackson Keyser, Eric Temple Bell, and S. I. Hayakawa. Concerning her book, The Education of T. C. MITS, Dorothy Canfield Fisher said: This is quite different from any other book you ever bought... full of mathematics and full of humor... also full of a deep, healing philosophy of life, reassuring, strengthening, [and] humane..." She edited several volumes of Galois lectures, including Martin's A Practical Simplification of the Method of Least Squares, several talks by Alonzo Church, and