This book tells the story of habeas corpus from medieval England to modern America, crediting the rocky history to the writ's very nature as a government power. The book weighs in on habeas's historical controversies - addressing the writ's role in the power struggle between the federal government and the states, and the proper scope of federal habeas for state prisoners and for wartime detainees from the Civil War and World War II to the War on Terror.

Examines the rise of an American-run global detention system, including Guantâanamo Bay, Bagram Air Base in Afghanistan, and secret CIA jails, and discusses efforts that are being made to challenge this new prison system through habeas corpus.