If you're interesting in reading more about the Cabinet, try the following books:

Anthony J. Bennett, The American President's Cabinet: From Kennedy to Bush (1996).

Jeffrey E. Cohen, The Politics of the U.S. Cabinet: Representation in the Executive Branch, 1789-1984 (1988).

Richard F. Fenno, The President's Cabinet (1959).

Shirley Anne Warshaw, Powersharing: White House-Cabinet Relations in the Modern Presidency (1996).