Here.  From the conclusion:

Good books leave the reader wanting more and help set an agenda for future scholarship, and Mutch has written a very good book. He takes as a given the premise that wealth inherently corrupts politics and leaves to future scholars the task of demonstrating precisely how that process has operated historically and what the policy outcomes have been. As a political and legal history, Buying the Vote has much to offer historians, political scientists, and students of public policy who wish to better understand the bewildering world of campaign finance law.