From Lord Salisbury to Tony Blair, the books of this twenty-volume set biographically profile the nineteen men and one woman who served as Prime Minister of Britain during the twentieth century. Each volume contains a chronological narrative that examines the life prior to arrival at 10 Downing Street, their activities while holding the premiership, and assesses their political legacy. Each volume also contains a chronology detailing international and domestic British political and cultural events during the prime minister's tenure and a guide to further reading.