Killer elite: the inside story of America’s most secret special operations team. Michael Smith. 2008.

A top-secret US Army Special Operations unit has been running covert missions all over the world, from leading death squats to the hideout of drug baron Pablo Escobar to assassinating key al-Qa’eda members, including Iraqi leader Abu Musab al-Zarqawi, and in one of their greatest missions, capturing Saddam Hussein, “The Activity” as it became known to insiders, has achieved near mythical status, even among the world’s Special Operations elite. Hidden from the politicians and the government bean counters, the Activity has been carrying out deniable operations, preparing the way for Delta and SEAL Team Six. 
Now journalist Michael Smith gets inside this clandestine military team to expose their explosive his Tory and secrets.