On the afternoon of May 11, 1812, Spencer Perceval, the all-powerful prime minister of Great Britain, was fatally shot at short range in the lobby of Parliament by John Bellingham, a Liverpool businessman. Perceval polarized public opinion: Revered by some and hated by others for his fight against the lucrative slave trade, he domineeringly kept Britain at war against Napoleon and was driving her into war with the United States despite the huge economic drain of each, raising taxes to new heights to finance his decisions. Bellingham was not alone in blaming Perceval and his government for their ruinous policies; indeed, he claimed to have killed Perceval "as a matter of justice," and believed he would not only be exonerated, but also applauded for his action. But he was not to enjoy relief; within a week, granted the briefest of trials that trampled his right to due process, he was hanged.

In Why Spencer Perceval Had to Die, Andro Linklater examines the assassination against the dramatic events of the time with the eye and insight of the finest detective.