The very word "czar" seems inappropriate in a constitutional republic, but it has come to describe any executive branch official who has significant authority over a policy area, works independently of agency or Department heads, and is not confirmed by the Senate--or subject to congressional oversight. Mitchel Sollenberger and Mark Rozell provide the first comprehensive overview of presidential czars, tracing the history of the position from its origins through its initial expansion under FDR and its dramatic growth during the presidencies of George W. Bush and Barack Obama. --from publisher description.