Albert Einstein (1879 1955) was born in Germany and became an American citizen in 1940. A world-famous theoretical physicist, he was awarded the 1921 Nobel Prize for Physics and is renowned for his Theory of Relativity. In addition to his scientific work, Einstein was an influential humanist who spoke widely about politics, ethics, and social causes. After leaving Europe, Einstein taught at Princeton University. His theories were instrumental in shaping the atomic age.

Robert Lawson (1892-1957) received his art training at the New York School of Fine and Applied Arts. His favorite medium, pen and ink, is used expressively and with detail in his black and white illustrations in The Story of Ferdinand (by Munro Leaf). In addition to illustrating many children's books, including Mr. Popper's Penguins, Robert Lawson also wrote and illustrated a number of his own books for children. In 1940, he was awarded the Caldecott Medal for his picture book illustrations in They Were Strong and Good and in 1944, he was awarded the Newbery Medal for his middle grade novel Rabbit Hill.