The Donor, by Christiaan Barnard (used, hardcover))

The work of Dr Rodney Barnes, internationally respected heart transplant surgeon, is hampered by a shortage of suitable donors, but he faces the worst dilemma of his life when his lover is critically injured in an accident, and declared brain dead, then becomes a potential donor. Blaming himself for this tragedy, Barnes calls on the full resources of the Groote Schuur Hospital's research team in order to keep her alive.