These recommendations were provided to me by Scott Horton from Antiwar Radio.  

Torture Team: Rumsfeld's Memo and the Betrayal of American Values by Philippe Sands

The Dark Side: The Inside Story of How The War on Terror Turned into a War on American Ideals by Jane Mayer

A Question of Torture: CIA Interrogation, from the Cold War to the War on Terror (American Empire Project) by Alfred McCoy

Chain of Command: The Road from 9/11 to Abu Ghraib by Seymour Hersh

The Guantanamo Files: The Stories of the 759 Detainees in America's Illegal Prisons by Andy Worthington

Guantanamo and the Abuse of Presidential Power by Joseph Marqulies

Taxi To the Dark Side (Film)

Torture Taxi: On the Trail of the CIA's Rendition Flights by Trevor Paglen and AC Thompson