David Jones 
Understanding Central Banking [PDF ebook] 
The New Era of Activism

Employing a light and lively writing style, the book starts with the history of central banking in England and then shifts focus to the United States, explains in detail how the Fed works, and covers the Fed’s unprecedented activities to prevent the Great Recession from spiraling into the Greatest Depression. The final chapter presents a detailed scorecard for each of the Fed chairmen over the last 40 years.