Russian Government and Politics (London/NY: Macmillan). See the table of contents, a sample chapter, and other materials on the book's website.
The new edition is coming out in March 2013
Every country changes with time, but very few countries alter as dramatically as Russia has done over the past 20 years. Russia has changed as a state, nation, and military power. It transformed its entire political and economic system. After the end of the Soviet Union in 1991––Russia was one of its 15 constituent republics––the country had to totally redefine its role as a reliable partner, global player, and an efficient member of international institutions. These 20 years saw a difficult process of reinventing, rebuilding, and restructuring. Russia keeps on changing today. Therefore, for those who study Russia, grasping these developments and interpreting them will remain a challenge.