In 1963, when South Africa's apartheid government charged Nelson Mandela with planning its overthrow, most observers feared that he would be sentenced to death. But the support he and his fellow activists in the African National Congress received during his trial not only saved his life, but also enabled him to save his country.

In Saving Nelson Mandela, South African law expert Kenneth S. Broun recreates the trial, called the "Rivonia" Trial after the Johannesburg suburb where police seized Mandela. Based upon interviews with many of...