How Congress Works. Congressional Quarterly, 1998. A clear overview of the internal structure and workings of the U.S. Congress.
Baker, Ross K.House and Senate. 3rd ed. Norton, 2000. A portrait of the interplay between Congress's two principal chambers.
Davidson, Roger H., and Walter J. Oleszek.Congress and its Members. Congressional Quarterly, 2002. Good introductory textbook.
Elving, Ronald D.Conflict and Compromise: How Congress Makes the Law. Simon & Schuster, 1995. The political editor of the Congressional Quarterly looks at how a bill becomes law, both on the open floors of Congress and behind closed doors.
Foerstel, Karen N., and Herbert N. Foerstel.Climbing the Hill: Gender Conflict in Congress. Greenwood Publishing, 1996. Explores the history and current status of women members and staff on Capitol Hill.