Mathews Phosa has been an eyewitness to the changing strands of political power in South Africa.

He was involved in the Black Consciousness Movement, the UDF and the ANC, before fleeing into exile in 1985 and becoming an Umkhonto we Sizwe commander in Mozambique. A lawyer by training, he was one of the first ANC members to return to South Africa to prepare the way for negotiations.

He was premier of Mpumalanga during the presidency of Nelson Mandela, with whom he had a strong relationship. Under Thabo Mbeki, whom he had known in exile, Phosa was pushed to the sidelines, with false accusations that he was involved in a 'plot' to overthrow Mbeki. Phosa had served under Jacob Zuma as an MK field commander in Mozambique, and he became treasurer general of the ANC when Zuma became its president at Polokwane. But Phosa later became a vocal critic of Zuma, and they didn't speak for years, until the night before Zuma's resignation. Phosa and Cyril Ramaphosa studied law together at the University of the North in the 1970s, and Phosa played a key role in advising him over the Phala Phala report that threatened to end his presidency. Frank and honest, Witness to Power is a gripping story of a courageous life, and an insider's account of South Africa's ruling party and its leaders.