Books

"The Solar Economy - Renewable Energy for a Sustainable Economy" by Herman Scheer, Earth Scan Publications, January 2010
Herman Scheer is the the key member of the German parliament responsible for the adoption of Feed-In Tariff policies that have made Germany the leader in solar energy production, and PV technology, put them ahead of their own carbon emission goals and created hundreds of thousands of jobs in the renewable industry in just a few years.

“Powering the Green Economy: The feed-in tariff handbook” by Miguel Mendonca, David Jacobs and Benjamin Sovacool, Earth Scan Publications, January 2010
Thorough explanation of how to design good FIT policies and evaluates how FIT programs are working in various countries.