Includes brief biographies of Niels Abel, James Joseph Sylvester, Augustin Cauchy, Arthur Cayley, Joseph Lagrange, Leonard Adleman, Évariste Galois, Camille Jordan, I.N. Herstein, Nathan Jacobson, Richard Dedekind, Emmy Noether, Saunders Mac Lane, Serge Lang, Sophie Germain, Andrew Wiles, Emil Artin, Olga Taussky-Todd, Leopold Kronecker, Irving Kaplansky, L.E. Dickson, Ludwig Sylow, Michael Aschbacher, Daniel Gorenstein, John Thompson, Marshall Hall, Jr., M.C. Escher, George Pólya, John H. Conway, William Burnside, William Rowan Hamilton, Paul Erdős, Richard W. Hamming, Jessie MacWilliams, Vera Pless, Philip Hall, Carl Friedrich Gauss, and Manjul Bhargava