PERMANENT REMOVAL, who killed the cradock four?

xv + 229pp., paperback, illus., ownership inscription on f.f.e.p., signed by author on half title, Wits University Press, Johannesburg, 2004

From the back of the book:

“This is the fascinating story of the search for those ultimately responsible for the deaths of the Cradock Four. Based on factual documentation and court records, it recounts the investigations and political intrigue surrounding the murders. More than any other case, it reveals how this notorious episode exposed the inner workings of the apartheid government’s State Security Council.”