I recently purchased The History of The British South Africa Police 1889 - 1980. I found it to be superb, a true and accurate history of a first class, professional Police Force.
Having served for over 31 years as a Police Officer in the U.K . from Constable to Senior Officer, I found this book fascinating and extremely informative. I especially enjoyed the way that the book is divided into sections, by the three authors, all of whom, served as Police Officers in The British South African Police, and therefore speak and write with personal knowledge of the Force and from personal experience. All in all an excellent book for anybody who has an interest in the former British Empire and especially Colonial Police Forces and how they operated.