When I was an MSW student, I was fortunate enough to be one of about 30 students to participate in a class with Assemblywoman Earlene Hooper. We spent three days in Albany learning about the legislative process. The text book we used for the class was Affecting Change: Social Workers in the Political Arena (Haynes & Mickelson). I can not recommend this book highly enough. Haynes & Mickelson eloquently explain the role of Social Workers in the legislative process and why even clinical practitioners need to be politically aware. It is well worth the price.